The expansion of islam resulted in european expansion in which of the following ways?

I did a little searching and I found out that your question is multiple choice. The answer choices are: 
A. Europeans sought to convert new people to Christianity to counteract Islamic influence.
B. Europeans wanted to get to China before the Chinese were converted to Islam.
C. Europeans were compelled to search for sea trade routes to Asia to avoid crossing Islamic lands.
D. Europeans who contributed to the Crusades were exposed to different cultures and languages.

The correct answer is A