The correct answer here is the option B.
The March on Washington occurred August in the year 1963. The purpose of this action was to gather support for the passing of the Civil Rights act. About 250.000 people were a part of the march and it was during this ceremony that Martin Luther King Jr. delivered his famous I Have a Dream speech .
From what i know Emanuel was capturing moments from where he wanted to surpise other people like the famous painting of washington was crossing the delaware
Pearl Harbor. The atomic bombs that we dropped on Japan was revenge for Pearl Harbor. We already had some issues with Japan but the surprise attack on Pearl Harbor was the main reason for the atomic bombs that President Truman dropped on Japan.