请教狒狒逻辑一题,THANKS!

Commissioner: Budget forecasters project a revenue shortfall of a billion dollars in the coming fiscal year. Since there is no feasible way to increase the available funds, our only choice is to decrease expenditures. The plan before you outlines feasible cuts that would yield savings of a billion dollars over the coming fiscal year. We will be able to solve the problem we face, therefore, only if we adopt this plan.

This reasoning in the commissioner’s argument is flawed because this argument

(A) relies on information that is far from certain

(B) confuses being an adequate solution with being a required solution

(C) inappropriately relies on the opinions of experts

(D) inappropriately employs language that is vague

(E) takes for granted that there is no way to increase available funds

我觉得应该选A,因为COMMISSIONER 认为THE PLAN 一定会起作用，所以不是应该是 relies on information that is far from certain 吗？

谢谢！

答案是A吗?

我怎么觉得B好些.

感谢感谢!

only if is the key to this question

At the last of the argument, the conclusion says if you want to solove the problem, you must take up the plan.