A result of epeirogeny is: a mountain range a plateau a river valley a continental shelf

The correct answer is mountain range.

A result of epeirogeny is called a "mountain range." Epeirogenic movement has caused the southern Rocky Mountain region to be uplifted from 1300 to 2000 m. The uplift is because of the lithospheric heating resulting from thinning and intrusion of widespread.

Epeirogeny is a geological process that causes the uplifting of a certain land mass or piece of land over a very long span of time, this results in the creation of Mountain ranges like the Andes and Himalayas.