Active volcanoes are most likely to form at
a. transform boundaries
b. divergent boundaries
c. the center of continents
d. convergent oceanic–continental boundaries

The answer is D because In plate tectonics, a convergent boundary, also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.

Iam pretty sure it is c. 2000 bce