The Two Main Drawbacks of Plans Are That ____ and ____

The two main drawbacks of plans are that ____ and ____.

A) they can be discouraging if they are too rigid and detailed; they tend to be overly optimistic
B) they can be discouraging if they are too rigid and detailed; they often fail to prioritize the most important things
C) they tend to distract people from actually completing the tasks at hand; they tend to be overly optimistic
D) they tend to distract people from actually completing the tasks at hand; they often fail to prioritize the most important things