The visit of an influential nuclear physicist to a population symposium in 1979 led to
a. the election of deng xiaoping in china.
b. the one-child policy in china.
c. new nuclear-power safety measures in populated areas in china.
d. the two-child policy in china.

d

explanation:

valentina tereshkova

soviet cosmonaut valentina tereshkova became the first woman to fly to space when she launched on the vostok 6 mission june 16, 1963. valentina tereshkova was the first woman to go into space. in 1963, she spent almost three days in space and orbited earth 48 times in her space capsule, vostok 6.jan 22, 2018