Legislator: University humanities departments bring in less tuition and grant money than science departments.
Conclusion (thus)
It is a mistake for universities to cut humanities departments when facing budget shortfalls.
Intermediate Conclusion (as a result)
Humanities departments subsidize science departments.
Intermediate Conclusion
Humanities departments bring in more money than they spend (whereas science departments spend more than they bring in).
Evidence (because)
Teaching and research cost significantly less in humanities than in sciences.
Evaluate
We're being asked about the second claim in the paragraph, which is prefaced by a because, so we know it provides support for the other half of the sentence its in.
The conclusion it provides support for is then supporting the "As a result" conclusion in the 3rd sentence, which is then supporting the "Thus" main conclusion in the final sentence.
Goal
Let's look for something resembling PREMISE / SUPPORT, and then when it comes to the multiple intermediate conclusions after that, we'll see how much the answer choices force us to care.