Which of the following resulted in an orogeny in eastern North America?

A) collision with an island arc
B) collision with a land mass called Avalonia
C) a continental collision
D) all of these
E) a and b only

Orogeny

The formation of mountains or the time period during which tectonic activity causes deformation and forms mountains.

Island Arc

A chain of volcanically active islands arranged in an arc, situated along the boundary of tectonic plates, generally forming over a subducting plate.

Avalonia

An ancient microcontinent or terrane whose history is recorded in the rocks of Eastern North America, the British Isles, and mainland Europe.