Which of the Following Statements About Insect Respiration Is FALSE

Which of the following statements about insect respiration is FALSE?

A) After diffusing through the walls of the tracheoles, oxygen is delivered to the body tissues by the circulatory system.
B) Air enters the bodies of insects through abdominal openings called spiracles.
C) Air sacs in many insects increase the speed of air movement through the respiratory system.
D) The insect respiratory system is composed of a series of branching tubes called tracheae.
E) None of the answer options is false.