Which statement is true if the president wants to engage in military action?

a The president can send troops into action, but Congress must declare war.
b The Senate can send troops into action, but the president must declare war.
c The House can send troops into action, but the Senate must declare war.
d The president can declare war without consulting Congress.

The statement that is true if the president wants to engage in military action is: a The president can send troops into action, but Congress must declare war.