Which of the following is correct? a. Mao Zedong originally encouraged large families. c. China tries to regulate religion to encourage unity. b. There is now a "one couple, one child" policy. d. All of the above

Mao Zedong originally encouraged large families, however there is now a "one couple, one child" policy, and China tries to regulate religion to encourage unity. Therefore, D. all of the above, is the correct answer!

D. all of the above!