What Is the convection pattern between 30° S and 30° N latitude

A Cooler air rises and moves away from the equator, then warms and falls and moves back to the equator
B Cooler air rises and loose toward the equator, then warm and falls and move away from the equator
C Air rises and moves the equator and falls and moves away from the equator
D Air rises and moves away from the equator and falls and moves back to the equator

B Cooler air rises and loose toward the equator, then warms and falls and move away from the equator