Which of These Would NOT Be Considered Informative

Which of these would NOT be considered informative?

A) Joe gives a presentation on the three new accounting packages the company is considering.He is looking for feedback,and he does not have a favorite yet.
B) Angelina reviews the procedures for the purchase order,as many of her sales representatives had questions about the process in the last month.
C) Professor Duan-An provides a review for the communication theory midterm.
D) Dat-Phan gives the school's valedictorian address that encourages the graduating seniors to make a mark in the world.