Which description of tectonic plates are true? a) number in the hundreds b) move very slowly c) move over the layer of earth's mantle d) can crush together to create mountains

I believe the answer would be D because when they collide they move the Earth

It would either be B: because they do move really slowly or D: because they can create mountains when they crush together. But creating mountains, in my opinion, is not a description. It's something that can occur, but it's not describing tectonic plates. So I would go with B.

Ithink it’s c or b for the answer.

Centriole.centrioles are present in animal cells but are usually absent in plant cells.