Which one of these is the correct pathway of the blood in the cardiac cycle as it returns to the heart from the vena cava?

The cardiac cycle describes the flow of blood through the heart. Deoxygenated blood returns from the body via the vena cava and enters the right atrium. It then passes through the tricuspid valve into the right ventricle. From the right ventricle, it is pumped to the lungs. Oxygenated blood returns from the lungs to the left atrium, passes through the bicuspid (mitral) valve into the left ventricle, and is then pumped to the rest of the body. The sequence in option C correctly follows this path through the chambers.