For Which of These Situations Would It Be Least Appropriate

Multiple Choice

For which of these situations would it be least appropriate to put something in writing?

A) When you are communicating with many different people in different locations
B) When you are communicating a complex new organisational procedure
C) When you are communicating information of a precise nature
D) When you are communicating an urgent piece of information that needs to be acted upon immediately
E) When you want to reinforce something you said earlier