Which is not a reason that Jimmy Carter lost popularity while serving as president?
A. He was unable to obtain the release of U.S. hostages held by Iranian militants.
B. His energy policies reduced business profits.
C. He ordered a response to Cambodia's seizure of a U.S. merchant ship that resulted in more loss of lives than it saved.
D. His efforts to improve the economy were unsuccessful and gave people the impression that he had no economic policy at all.