Regarding a Comparison of Sexuality in the United States and Other

Regarding a comparison of sexuality in the United States and other countries, which of the following statements is/are TRUE?

A) People from the United States and other industrialized nations are more likely to have had only one recent sexual partner.
B) A survey of 59 nations found that a "sexual revolution" has not occurred in most developing countries.
C) In the countries in Africa where AIDS is epidemic, Africans report having more sexual partners than their counterparts in developing countries.
D) All of these statements are true.