Whereas scientists, because of random fluctuations in the weather, cannot determine the transition from one season to the next by monitoring temperatures on a daily basis, so they cannot determine the onset of global warming by monitoring average annual temperatures.

(A) Whereas scientists

(B) Just as scientists

(C) Like scientists who

(D) Inasmuch as a scientist

(E) In the same way a scientist

答案是B。
我懂B。但是我的疑问是为什么D不对呢？