Answer:
B)Gathér information
Step-by-step explanation:
After Action Review is a process that involved team do in order to analyze the past operation that already completed. In this review, they will identify a list of problems that occurred during the operation and find out how and why it happened.
AAR is usually read by the people involved in future operations to avoid similar mistakes. So, the fact that Bill reading it is most likely because he's gathering information regarding the things he should pay attention to for future projects,