Why Did the U-2 Summit End So Poorly for the United

Why did the U-2 Summit end so poorly for the United States?

A) The Soviets were able to use their shooting down of a U.S. spy plane to embarrass Eisenhower.
B) Khrushchev attended the meeting drunk and made outrageous accusations that angered Eisenhower.
C) Terrorists planned to bomb the building, leading both sides no choice but to call off the summit.
D) Eisenhower was recovering from surgery, leading Khrushchev to act more aggressively in the negotiations.
E) The United States had refused to engage in spying efforts against the Soviets and, thus, came across as weak.