Read the excerpt from president reagan’s address at moscow state university.
even as we explore the most advanced reaches of science, we're returning to the age-old wisdom of our culture, a wisdom contained in the book of genesis in the bible . .
in this excerpt, reagan uses
procatalepsis to argue against an opposite view.
repetition to build rhythm and momentum.
allusion to give his speech more authority.
advanced science to prove his opinion.

C) allusion to give his speech more authority.

Explanation: Allusion is a reference (usually is very brief) to a person, place, thing, idea or event, that can be political, historical or cultural. Usually the reference is made in an indirect way and does not describe in detail the object of the allusion. In the given excerpt from the Address at Moscow State University of President Reagan, we can see a clear example of allusion to the book of Genesis in the Bible.

- the heat nearly killed them that first summer.