____business you may be engaged in, you want do you best. A. Whatever B. However C. Whoever D. Where

____business you may be engaged in, you want do you best. A. Whatever B. However C. Whoever D. Wherever

The correct answer is A. Whatever.

Explanation:
The sentence is:

____ business you may be engaged in, you want to do your best.

Here, the structure requires a word that introduces a clause meaning “no matter what business you are engaged in.”

Whatever fits because it means “no matter what,” and it correctly modifies business in this concessive clause.

The other options are grammatically incorrect in this context:

However → would need to be followed by an adjective/adverb (e.g., “however difficult it is”).

Whoever → refers to people, not things.

Wherever → refers to places, not types of business.

Thus, Whatever is the right choice.

Correct sentence:
Whatever business you may be engaged in, you want to do your best.