the Grand Canyon the Great Plains the Himalayan Mountains the Mariana Trench
I gave my students this multiple choice question: Between 40 and 50 million years ago, the landmass on the Indian plate collided with the landmass on the Eurasian plate. What formed when these landmasses collided?

Only one answer is correct among these 4 choices:
- the Grand Canyon
- the Great Plains
- the Himalayan Mountains
- the Mariana Trench

Could you tell me which one is correct?

the Himalayan Mountains