Modos is not a rhetorical device. Hope this helped.
A synthesis<span> is a written discussion that draws on one or more sources. It follows that your ability to write syntheses depends on your ability to infer relationships among sources - essays, articles, fiction, and also nonwritten sources, such as lectures, interviews, observations.</span>
The moral of the story… is that what you’re asking?
I think it’s A cause it can’t be C. Would be better to see the whole story maybe next time? Or a little bit more of it :)