What happened to the tsar during the russian revolution? 1.he regained power. 2.he went into exile. 3.he was executed. 4.he died of natural causes.

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