The correct answer is - He wanted Iran to modernize and Westernize.
Mohammad Reza Pahlavi was an Iranian leader that wanted to turn around the politics and views of the country, and he wanted to make Iran more modern and Westernize it. He wanted to do this because he thought that his country is stagnating, while the Western world as well as East Asia, are going forward, so he tried to make his country more open to new technologies, ideas, cultures, in order to be in touch and follow the progress of the more developed countries.