Sentence Correction (SC) | Re: Carbon dioxide, which traps heat in the atmosphere and helps regulate

Carbon dioxide, which traps heat in the atmosphere and helps regulate the planet’s surface temperature, is constantly beingexchanged between the atmosphere on the one hand and the oceans and terrestrial plants on the other.

A.exchanged between the atmosphere on the one hand and the oceans and terrestrial plants on the other
B.exchanged, on the one hand, between the atmosphere and the oceans