In the 1970s, the shah of Iran was returned to power by the CIA.
overthrown and sent into exile.
replaced with his son Mohammad.
given power and took control of Iran.

The correct answer is B. Overthrown and sent into exile.

Explanation

During the year 1977 in Iran, the event known as the Iranian Revolution began, in which various mobilizations originated that allowed the overthrow of Shah Mohammad Reza Pahleví, who on January 16, 1979, left his post and went into exile. Those Mobilizations against this shah originated from the support he gave to the interventionism of the United Kingdom and the United States. According to the above, during the 1970s, the Shah of Iran was B. overthrown and sent into exile.

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