How Were the Ural Mountains (Russia)formed

Multiple Choice

How were the Ural Mountains (Russia) formed?

A) A large dome of Archean igneous and metamorphic rocks rose up as the Eurasian plate became situated over a mantle plume.
B) Kilometres of marine strata, originally deposited in a basin between the former Asian and European plates, were squeezed, folded, and uplifted as the two collided and joined to form the Eurasian plate.
C) Normal faulting from a modern continental rift is elevating large mountain blocks above the level of the vast plains on both sides of the range and giving rise to a volcanic mountain chain.
D) An active fold and thrust belt is forming as Asia and Europe continue to converge and buckle the crust along an old tectonic suture zone.