Final answer:
Option (C), The right ventricle pushes blood to the lungs through the pulmonary artery, facilitated by the pulmonary semilunar valve to prevent backflow.
Step-by-step explanation:
The right ventricle pushes blood to the lungs via the pulmonary artery. When the right ventricle contracts, it ejects blood into the pulmonary trunk, which soon branches into the left and right pulmonary arteries that transport the blood to each lung for gas exchange.
At the base of the pulmonary trunk, the pulmonary semilunar valve functions to prevent the backflow of blood from the pulmonary trunk.