The correct statement from the excerpt is that reagan uses allusion to remind his audiences of russian authors whose writings support his argument.
<h3>What is an allusion?</h3>
This is a literary device that is used to refer to the indirect reference that is made to a person by another person during a speech.
Allusion is used here to show how Reagan referenced the Russian writers as he made the speech.
Read more on allusion here: brainly.com/question/17728761
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Ruomei's new liking for biology has been conditioned.
She was 'conditioned,' aka learned to love biology because of the guy she has a crush on. Previously, she wasn't interested in biology, but when she started liking this guy, she somehow connected her attraction to him to her growing love for biology. Thus, the guy was her stimulus to become conditioned to love biology.