Which event concluded during the george h. w. bush administration?

a.) the persian gulf war
b.) the fall of the soviet union
c.) the war in grenada
d.) the release of the hostages in iran

The best and most correct answer among the choices provided by the question is the second choice "the fall of the Soviet Union"

In 1988, Bush ran a successful campaign to succeed Reagan as President, defeating Democratic opponent Michael Dukakis. Foreign policy drove the Bush presidency: military operations were conducted in Panama and the Persian Gulf; the Berlin Wall fell in 1989, and the Soviet Union dissolved two years later.

I hope my answer has come to your help. God bless and have a nice day ahead!