1) True or False?

The Lego theory was one where the US government felt that if one country fell to communism, others would too.

2) True or False?

The US policy of containment would be used for justification to become involved in Vietnam.

3) This type of warfare was extremely difficult to fight in the jungles of Vietnam.

A) Jungle welfare

B) Guerilla welfare

C) Trench warfare

The answer for 1 is False

This was called the domino theory, not the lego theory. It was based around the idea that if one country fell to communists, others would too, like dominoes would fall and get other dominoes to fall in continuation when you put them all up vertically. Legos had nothing to do with this because they don't fall and don't pull other legos with them.

The answer for 2 is True.

The policy of containment was about preventing communism from spreading. This was used when invading Korea, as well as Vietnam, because it was believed that letting communists take Vietnam would result in all other South East Asian countries becoming communist countries, which more or less happened.

The correct answer for 3 is A) Jungle welfare

Jungles were a huge part of Vietnam and were extremely dangerous for unprepared American soldiers. The Vietnamese soldiers would hide in the trees, dig holes in the ground and make tunnels, they would set traps out of trees and rocks and similar things and would make life miserable for American troops.