Diaphragm and Rib Cage Muscle Movement in a Human Is

Diaphragm and rib cage muscle movement in a human is replaced by what air volume control mechanism in insects?

A) The movement of the body surface compresses and expands the tracheal tube system to ventilate air.
B) The spiracles are able to adjust to ventilate air.
C) Carbon dioxide and oxygen are able to diffuse directly into the muscle cells of the insect so there is no need to ventilate air.
D) Tracheoles are able to contract their muscles to ventilate air.
E) Insects are not capable of forced movement of air at any time.