It was primarily the fact that the British Navy was kidnapping American sailors and making them serve onboard British vessels during the Napoleonic Wars that caused the united states to impose economic sanctions against them.
Colonial radicals formed "Minutemen" in towns through the colonies to keep the public informed about abuse of colonial rights by the British government, since at this time there was no formal, centralized military.
President Nixon reduced tensions between the US and the Soviet Union by traveling to China as well as the Soviet Union. When there, he signed an Arms Control Treaty with the Soviet Union in hopes of lessening the tensions.
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Answer: A) the sinking of the Lusitania
Explanation: The other three options can be eliminated pretty easily:
B) is not correct because the British never invaded the United States, especially not during WWI, as we were on their side
C) is not correct because the bombing of Pearl Harbor occurred during WWII
D) is not correct because NYC was never bombed
