In 1979, china passed its "one child policy" mainly to a) reduce unemployment. b) reduce the need for additional housing. c) increase the population of girls in china. d) stabilize or lower the rate of population growth.

In 1979, China passed its "One Child Policy" MAINLY to D) stabilize or lower the rate of population growth.

The country of China sort to extreme measures of controlling population growth by introducing the one-child policy in 1979. This policy came after a decade of the two-child policy. Instead of only encouraging the use of contraceptives for population control this policy was adopted for three decades.

The policy was changed to allow for a second child in the first year if the first child was a girl. It was enforced by the provision of contraceptives, sterilization, and abortion services if required. However, it wasn't strictly a one-child policy as many families went on to have two children.

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