Answer:
The statement which best describes the effect of the 1979 Iranian Revolution is that Iran became a monarchy that supported increased oil trade with the United states.
What is Iranian Revolution?
Iranian Revolution also denoted as the Islamic revolution which was known as the series of the events which was overthrown in the dynasty of Pahlavi under Mohammad shah.
The best step was that Iran became a monarchy which relatively supported rise in the oil trade with the United states in the Iranian Revolution which was held in 1979.
Step-by-step explanation: