At a convergent plate boundary, A. sea floor is produced. B. high mountains may be built during continent-continent collision. C. there are very few earthquakes. D. All of the choices are correct.

The correct answer is B - high mountains may be built during continent-continent collision.

Explanation:

A convergent plate boundary is where two or more tectonic plates collide. When this happens, subduction (one of the plates will slide under the other) occurs.

During continent-continent collision, a high mountain range is usually formed.