What Was the United States' Response to the Bombing of an American

What was the United States' response to the bombing of an American and French barracks in Lebanon,killing 241 American servicemen?

A) The United States bombed the Palestinian Liberation Organization strongholds in Lebanon.
B) The United States sent troops to Afghanistan to hunt down the mujahidin,who they believed was responsible for the attack.
C) The CIA worked with Hezbollah on covert operations to find the perpetrators.
D) President Reagan quickly recalled the U.S.troops.