Which of These Statements Describes the Closure of the Valves

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

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