GMATninja
Thank you for your awesome explanations to the other questions that I had posted on the GMAT club forum
I want to know how to tackle this question. Here's what I mean by that
When I read the question the first time I knew that the question was testing the concept of parallelism. "and" jumped off the page at me. Also, from the sentence structure, I understood that I would need a second "how" in this sentence. And I could quickly narrow it down to Option D and E.
I am having a really hard time choosing Option E over Option D. Also, this particular question tests my understanding of placing a subject before a verb in a declarative sentence. (This is the first time I am reading the concept, I understood the concept from the explanations posted on this question thread). And the concept is not tested very often ( there can be many concepts like these which I might not know off), and in case if I do not know that how to tackle questions like these. What to do in cases like this?
And I choose D over E for this question.
D. It is well known in the supermarket industry that X and Y are often crucial to profits.
( If it is already well known why can't we use "are". )
E. It is well known in the supermarket industry that X and Y can be crucial to profits
(If it is already well known why do we use "can". "are" is a better choice)