New species develop when a) diverging species no longer recognize one another as potential mates. b) diverging species mate exclusively. c) diverging species mate with multiple members of the other species. eliminate d) diverging species recognize many potential mates among both species.

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The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11