Explanation
Multiple triggers on the same object can cause conflicts and performance issues. Multiple unit test failures can indicate poor code quality and lack of maintenance. Duplicated logic across Visualforce pages and Apex classes can lead to inconsistency and redundancy.

Explanation
A and B are the best techniques to ensure a smooth and timely deployment, as they ensure that the code is consistent, version-controlled, and validated against the target environment. C is not a good technique, as it creates an unnecessary sandbox that does not reflect the production environment. D is not a good technique, as it does not allow for testing and validation before deploying to production.

Explanation
The responsibility of the Technical Architect within a Change Control Board meeting is to approve the upcoming release for deployment into production, as they are the ones who have the authority and expertise to evaluate the quality and readiness of the release2. Option A is not correct, as prioritizing the Salesforce product roadmap with business stakeholders is not a task that is done in a Change Control Board meeting, but rather in a strategic planning session. Option B is not correct, as conducting code reviews for projects in the development phase is not a task that is done in a Change Control Board meeting, but rather in a code review session. Option C is not correct, as troubleshooting deployment errors that occurred during the last release is not a task that is done in a Change Control Board meeting, but rather in a post-deployment review session.

Explanation
The three benefits of using a partner development org over an individual development org in this scenario are:
Partner development org has a greater number of licenses available for the team. This means that the developers can test their app with different user profiles and permissions, and also invite beta testers to provide feedback2.
Partner development org offers higher API limit. This means that the developers can use more API calls to integrate their app with external systems or services, and also leverage the Salesforce APIs to automate their development and deployment processes2.
Partner development org offers more storage. This means that the developers can store more data and files in their org, and also use more features and components that require storage, such as Big Objects, Platform Events, or Lightning Web Components2.
The other options are not benefits of using a partner development org over an individual development org in this scenario, because:
Only partner development org supports managed beta testing. This is not true, as both partner development org and individual development org can create and distribute managed beta packages3.
Partner development org never expires. This is also not true, as partner development orgs have a
12-month expiration period, which can be extended by request

Explanation
Manually validating change sets before deployment is a recommended practice to avoid possible delays while deploying a change set, as it can help you identify and resolve any errors or dependencies before the actual deployment. Change set performance is not independent of included components, as some components may take longer to deploy than others. Manually creating new custom objects and new custom fields or manually applying the field type changes are not advisable, as they can introduce human errors and inconsistencies between environments. See Deploy Changes with Change Sets for more details.