Which of the following events most directly led to american military involvement in world war ii?

the japanese attack on pearl harbor
the bombing of london
the soviet union entering the war
germany's invasion of poland

"the japanese attack on pearl harbor"

Explanation:

The attack on Pearl Harbor was a surprise military offensive by the Imperial Japanese Navy against the United States naval base at Pearl Harbor (Hawaii) on the morning of Sunday, December 7, 1941. The attack was intended as a preventive action aimed at to avoid the intervention of the United States Pacific Fleet in the military actions that the Empire of Japan was planning to carry out in Southeast Asia against the overseas possessions of the United Kingdom, France, the Netherlands and the United States. The Japanese made this offensive coincide with the attack on the possessions of the British Empire in Hong Kong, Malaysia and Singapore, which were already in their possession in mid-February 1942.

The attack deeply shocked the American people and led directly to the entry of the United States in World War II, both in the theaters of war in Europe and the Pacific. The day after this offensive, December 8, the United States declared war on the Empire of Japan.

Pearl Harbor

Explanation:

...don't mess with the U.S. lol

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.

because he created electricity