Answer:
The paragraph from the article which Best supports the claim that teachers in Philadelphia are sticking to legal requirements by protecting immigrant students is:
C. Most important, ESL teacher Meg Flisek told her colleagues, students are entitled to an education regardless of immigration status, and federal law prohibits school staff from disclosing any student information, even to U.S. Immigration and Customs Enforcement agents.
Step-by-step explanation:
According to paragraph C, not disclosing information about immigrant students is in accordance with federal law. Therefore, when teachers protect those students by not revealing their status to agencies, they are in fact acting according to legal requirements. It is not only their right to do so, it is their duty. Thus, they are not breaking the law: They are using it in those students' favor.