Which of the following is NOT a valid limitation or drawback of using the AOA notation?

A. The AOA notation is a bit more challenging to understand than the AON notation, initially.

B. If there are two or more tasks with the same starting and ending events, they would both be denoted the same, which causes ambiguity between two tasks.

C. In some instances, a dummy task that costs nothing and requires zero time to complete must be used in AOA precedence networks to represent certain precedence relationships.

D. It is easier to store and transmit the structure of an AOA precedence network than an AON precedence network.