The series of transgressions and regressions that produce cyclothems were likely produced by

➡the series of transgressions and regressions that produce cyclothems were likely produced by glaciations.

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

it would be rhyolitic hope this