As a Product Owner, you are accountable for maximizing the value of the product and the work of the Scrum Team. To do this, you need to collaborate with various stakeholders, user communities and other Product Owners to understand their needs, expectations and feedback, and to align them with the product vision and strategy. You also need to work with the Developers on Product Backlog refinement, which is an ongoing activity to add detail, estimates and order to Product Backlog items. This helps the Developers to understand what is valuable and feasible to deliver in the upcoming Sprints, and to plan and execute their work accordingly. These are typical and essential work for a Product Owner in a Sprint.
The other options are not typical or effective work for a Product Owner in a Sprint. Attending every Daily Scrum is not necessary, as the Daily Scrum is an event for the Developers to inspect their progress and plan their next steps. The Product Owner can attend the Daily Scrum if invited by the Developers, but should not interfere or answer questions that are not related to the Sprint Goal or the Product Backlog. Creating financial reporting upon the spent hours reported by the Developers is not a valuable activity, as it does not reflect the outcome or the value delivered by the product. It also goes against the Scrum values of trust and respect, as it implies that the Developers are not self-managing or committed to their work. Updating the work plan for the Developers on a daily basis is also not a good practice, as it undermines the autonomy and creativity of the Developers, and reduces their ability to inspect and adapt their work based on the empirical evidence. The Product Owner should not tell the Developers how to do their work, but rather focus on what is the most valuable outcome for the product.
References:
Professional Scrum Product Owner™ II Certification
Understanding and Applying the Scrum Framework
Managing Products with Agility

According to the Professional Scrum Product Owner™ II certification guide1, the Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team. This means that the Product Owner should collaborate with the Developers and the Scrum Master to find the best way to deliver value in the current Sprint, even if the initial forecast is not met. The Product Owner should not change or abandon the Sprint Goal, as it is a commitment made by the Scrum Team during Sprint Planning. The Product Owner should also not skip Product Backlog refinement activities, as they are essential for preparing the Product Backlog for future Sprints. The Product Owner should not end the Sprint prematurely, as it may cause more disruption and waste than delivering a potentially releasable Increment. The Product Owner should not inform management that more resources are needed, as it may imply that the Scrum Team is not self-organizing and cross-functional. The Product Owner should respect the Developers' autonomy and professionalism and support them in finding the best solution to the problem. Therefore, the best answer is to reduce the scope of the Sprint, if possible, to still meet the Sprint Goal. This means that the Product Owner and the Developers should negotiate the scope of the Sprint Backlog within the Sprint, removing or adding Product Backlog items that are aligned with the Sprint Goal and the value delivery. Reference: 1: Professional Scrum Product Owner™ II Certification | Scrum.org

= Based on the Evidence-Based Management (EBM) framework, your product has a high Current Value (CV), which means that it delivers value to the existing customers and meets their needs and expectations.
However, it also has a high Unrealized Value (UV), which means that there is a large gap between the potential and actual use of the product in the market. This indicates that your product has a low awareness, reach, or appeal among the potential customers who could benefit from it.
To increase the business performance of the product, you need to reduce the UV and increase the Ability to Innovate (A2I), which is the ability to deliver future value. One way to do this is to improve the marketing of the product, which can help you to communicate the value proposition, differentiate the product from the competitors, and attract a greater number of customers. This can also provide you with more feedback and data to inform your product strategy and backlog prioritization.
The other options are not the best actions to take, because they either do not address the root cause of the high UV, or they may compromise the CV or A2I of the product. Increasing the number of product features may not necessarily increase the value or the demand for the product, and it may also increase the complexity and the cost of development. Releasing an identical product with a new name may confuse the customers and dilute the brand identity, and it may also create legal or ethical issues. Dropping the price for the product may not be a sustainable or profitable strategy, and it may also affect the perceived quality or value of the product. References := Professional Scrum Product Owner II Certification, Managing Products with Agility, Evidence-Based Management