Further research may yield new insights _____ to the spending habits of younger demographics.試題8回答A.pertainsB.pertainedC.pertainingD.pertain

The correct answer is C. pertaining.

The sentence is looking for a verb that can link "new insights" with "the spending habits of younger demographics." The verb "pertain" means to be appropriate, related, or applicable to.

In this context, we need a form of "pertain" that can describe the relationship between "new insights" and "the spending habits of younger demographics."

The word "pertaining" is the present participle of "pertain" and is often used to describe something that is connected with the subject being discussed.

So, the completed sentence is: "Further research may yield new insights pertaining to the spending habits of younger demographics."