Which deliverable involves creating comprehensive reports that provide key information to investors?

The correct choice is pitch books, which are designed to communicate essential information to investors in a comprehensive, organized manner. A pitch book typically includes details about a firm's services, case studies, market opportunities, and specific investment strategies or proposals. It serves as a vital tool for investment professionals to present their ideas, showcase their expertise, and facilitate discussions with potential clients or investors.

Pitch books are often tailored to reflect the current market landscape and are designed to address the specific needs and interests of the intended audience, making them a key deliverable in investor communications. They not only present data and analysis but also help to persuade and build confidence in the investment proposition being discussed.