Ravi: The highest priority should be given to the needs of the sales dept., because without successful sales the company as a whole would fail.
Ed: There are several departments other than sales that must also function successfully for the company to succeed. It is impossible to give the highest priority to all of them.
Ed criticizes Ravi's argument by pointing out:
A. That the sales department taken by itself is not critical to the company's success as a whole.
B. The ambiguity of term "highest priority".
C. That the departments other than sales are more vital to the company's success.
D. An absurd consequence of its apparent assumption that a department's necessity earns it the highest priority.
E. That Ravi makes a generalization from an atypical case.
I chose E, can anyone explain both of them for me? I'm getting confused about the necessity earns in choice D.