The cockroach originated on Earth more than 250 million years ago and is thriving today all over the world. A giant deer (more than 2m tall!) evolved less than 1 million years ago and become extinct around 11,00 years ago.
Why do YOU think one animal thrived and the other perished?

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

the awnser is a

it is not b or c