GMAT Critical Reasoning (CR) | Re: The drought in the central part of the country is estimated

I think D is correct.

B. Irrigation is the only way that the national corn yield can be significantly increased.
Irrigation is the only medicine which can increase yield significantly. Whether that "significant increase" would be sufficient to avert the inflation or not ? we cant say... E.g Doctor claims that some medicine can significantly heal a fractured knee, but does it ensure that person can start playing football after taking such medicine... No.. similarly even if irrigation