I believe 3 is the answer, because I think the U.S bought a part of Mexico.
(a) is the answer in studying this actually!
Answer: The freedom fighters used to rebel against the dominating committees.
Explanation:
During freedom seeking movements the freedom riders used to get the punishment for breaching peace rather than breaking the state laws. This was the strategy to clog the penal facilities. The freedom riders used to get physical and mental punishment. Punishment is associated with risk of injury but it used to be necessary for creating awareness that freedom is of utmost importance for nation.
This policy was called "containment" - the idea was to contain communism from spreading to new countries without trying to actively challenge the communist system in the countries that already had it.
This policy lead to some proxy wars, in which the US fought the Soviet Union for the free countries.
They are direct and representative.
Hope this helps :)
