What Was One Way in Which the Intervention of the United

What was one way in which the intervention of the United States in Iran in the 1950s was significant?

A) Intervening in Iran proved to be the first and last time since World War II that the United States detonated a nuclear weapon, signaling the height of the Cold War.
B) The rise of an increasingly authoritarian regime in Iran as a result of U.S.involvement convinced Eisenhower that he must refuse to target the government of Guatemala.
C) The United States proved unsuccessful in toppling Iranian rulers and lost many soldiers in the process, causing Eisenhower to prevent similar interventions in the future and adopt a more isolationist policy.
D) A CIA-engineered coup in Iran was viewed as successful and emboldened Eisenhower to authorize other secret operations to undermine governments thought to be falling victim to communism.
E) By giving assistance to the shah, Mohammad Reza Pahlavi, U.S.forces made Iran more stable, earned the trust of the Iranian people, and ensured peaceful interactions with Iran decades later.