Which of the Following Describes the Closure of the Valves

Which of the following describes the closure of the valves in a normal cardiac cycle?

A) The aortic valve closes slightly before the tricuspid valve does.
B) The pulmonic valve closes slightly before the aortic valve does.
C) The tricuspid valve closes slightly later than the mitral valve does.
D) Both the tricuspid and pulmonic valves close at the same time.