Http://digital.library.upenn.edu/women/keller/life/life.html
<u><em>Subject. A subject in grammar is the first part in a sentence about which the second part, the predicate, tells something.</em></u>
Answer:
Evidence.
Explanation:
Evidence is the concrete facts used to support a claim. ... Many arguments begin by treating something as a claim, try to prove it, and then, once they have proved it to the author's satisfaction, treat it as a fact to be used as evidence to support some new claim.
The answer is A:parents should set a good example for their children
A because global warming is really occuring
