A flexible expense is something that can be changed at any time. Vacation savings fits the mold of this, as it can be changed. It is not desperately needed, unlike the others.
Answer:
Ghost Rider is a Marvel Character
Explanation:
He has appeared in marvel comics but no movies so far
Bulgaria, Czechoslovakia, Poland, and Romania
His most challenging and unresolved problem was the takeover of the U.S. Embassy in Tehran, Iran in 1978 by Islamic fundamentalists and the taking of more than 40 American hostages. Carter was unable to secure their release during his presidency. The were released once Ronald Reagan took office.