In 1968, john met yoko ono at and the two began having a very public affair.

In 1968, John met Yoko Ono at HER OWN ART EXHIBITION IN LONDON,
John Lenon and Yoko Ono met at Yoko's art exhibition which took place at indica museum at London. The two took a liking to each other and later got married. After marriage, they performed their artistic works jointly.

The correct answer would be D. Eisenhower was made Supreme Allied Commander by then-President Franklin Delano Roosevelt. He was put in charge of Operation Overlord, which is better known as D-Day.