The correct answer is - A. The United States was willing to support pro-American regimes in foreign states even if they were not democratic.
The United States and Iran had much more different relations that what we seen nowadays. In the early 1950's the United States were playing on the soft power card with Iran. They were supporting a certain side in the country in order to gain support and ally themselves. Iran was a country that was of a great strategic importance, which was very important for the United States. Also, Iran had a very large market, as it had a large population that was constantly on the rise, so on open border for the American companies was going to be very beneficial economically.