To configure a pie chart that displays the number of cases each manager has created using a list report:
B: Group the manager name column. Grouping the report by the manager name column aggregates the data such that each manager's entry shows the count of cases they have created. This configuration provides the necessary data structure for a pie chart visualization, where each slice represents a manager and their corresponding case count.

Delegation is used in Pega to enable business users to manage specific business rules or parameters directly. It addresses:
B: A risk officer wants to adjust the income threshold for automobile loans. This requirement is ideal for delegation as it involves a business parameter (income threshold) that may need frequent adjustments based on market conditions or internal policies. Delegating this allows the risk officer to make adjustments independently without requiring changes through IT or development teams.

Collaboration tools that enhance team communication and information sharing:
C: Tags. Tags allow users to categorize and reference specific information within cases, making it easier for teams to search and communicate about case-related topics efficiently.
D: Pulse. Pulse is a social collaboration tool within Pega that enables team members to communicate in real-time, share information, and collaborate directly within the context of a case.

For displaying book cover pictures in a grid or list format on an online bookstore form:
C: Repeating dynamic layout. This layout type is ideal for displaying collections of items such as book covers, as it can dynamically repeat content based on the data source. It allows for an organized, responsive, and visually appealing presentation of new arrivals, each represented by their respective cover image.