Why did congress pass the war powers resolution?

To allow the president to appoint the secretary of defense.
To limit the presidents power to appoint ambassadors.
To allow the president to negotiate treaties.
To limit the presidents ability to send troops into combat.

To limit the president's ability to send troops into combat.

The War Powers Resolution was passed by Congress in 1973 as an attempt to limit the president's ability to send troops into combat without congressional approval. It was a response to concerns over the Vietnam War and the perceived imbalance of power between the president and Congress in matters of war-making.