What must happen for scientific theories to be accepted as valid?

scientific evidence must be reported, verified, and accepted by the scientific community.

a hypothesis must be upgraded with supporting experimental evidence.

biological manufacturers must conduct clinical trials.

the research team must apply for and receive federal funding based on several early tests.

Which of the following factors would not contribute to allopatric speciation? a) the isolated population is exposed to different selection pressures than the ancestral population. b) a population becomes geographically isolated from the parent population. c) gene flow between the two populations is extensive. d) the separated population is small, and genetic drift occurs. e) different mutations begin to distinguish the gene pools of the separated populations.