Which of the following statements is correct regarding speciation with secondary reinforcement? I the reproductive isola

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Which of the following statements is correct regardingspeciation with secondary reinforcement?
I the reproductive isolating mechanisms that developedduring the geographic isolation are somewhat weak but the hybridsbetween two populations have higher fitness, then the speciationprocess may continue
Speciation with secondary reinforcement can only occurif the taca becomes at least partially sympatric
When geographic isolation comes to an end, twopopulations always have to complete the divergence process andbecome two species.
If postzygotic isolation is very weak, thenreinforcement is more likely
If hybrids have lower fitness, then that may select forincreased prezygotic isolation.