The us recession in the 1970s was caused by

The US recession in the 1970s was caused by a period of economic stagflation that followed the economic expansion era experienced after WWI.

A stagflation period is chracterized by low economic growth, high unemployment rates and on top, high inflation levels. It is an extremely difficult situation for policymakers, as measures that aim to decrease inflation tend to worsen the low growth and unemployment problems and viceversa.  

A. To protect the interests of the United States  

B. To preserve the lives of the hostages

Explanation:

The hostage crisis in Iran took place over a period of 444 days, during which a group of Iranian students took 66 diplomats and citizens of the United States of America (USA) hostage. The crisis began on November 4, 1979 and lasted until January 20, 1981.

Carter refused to yield to the demands, Khomeini used the situation to consolidate his power and nullify the challenges of the moderate wing of his government, headed by its president. The euphoria over the humiliation of the most powerful nation distracted the Iranian people from the economic difficulties of their country. Carter, in April 1980, broke diplomatic relations with Iran and imposed a trade embargo, except medicine and food. Iranian funds in the US they were frozen and accounted for to compensate the hostages when they were released and to pay the demands of US companies against Iran.