Answer:
A. anti-American feelings
Step-by-step explanation:
The Shah of Iran, Reza Pahlavi, was overthrown in 1979 by the Iranian Revolution. The Shah Reza Pahlavi had the support of Western powers like the US, the UK, and Germany, that made Iran one of the main allies of the US in the Middle East against the expansion of the Soviet Union. During the years previous to the revolution there were a series of uprisings and social discontent due to the big economic inequality of the Iranian society and the strong control exerted by the Shah's government. This discontent was capitalized by Ayatollah Khomeini, a religious leader that called the opposition to unite in order to overthrow the Shah using strong anti-American rhetoric. After the revolution succeeded, Ayatollah Khomeini established an Islamic theocratic dictatorship. In this context, the diplomatic body of the American embassy in Tehran was taken as hostages by the revolutionaries who followed the Anti-American feeling fueled by Ayatollah Khomeini.