Answer:
B: Taking a vacation now would not be very wise.
Step-by-step explanation:
A is too wordy and doesn't really clarify it's point.
C is in first person and makes one's writing sound like an opinion, instead of a statement. C is also too wordy and not concise.
D is in first person and makes one's writing sound like an opinion, instead of a statement.
Therefore, the answer is B, "Taking a vacation now would not be very wise."
I hope this helped!