divergent boundary between two oceanic plates divergent boundary between an oceanic plate and a continental plate convergent boundary between an oceanic plate and a continental plate convergent boundary between two continental plates
I gave my students this multiple choice question: At which type of margin does mountain building produce mountains composed entirely of preexisting crust material?

Only one answer is correct among these 4 choices:
- divergent boundary between two oceanic plates
- divergent boundary between an oceanic plate and a continental plate
- convergent boundary between an oceanic plate and a continental plate
- convergent boundary between two continental plates

Could you tell me which one is correct?

convergent boundary between two continental plates