What sounds more proper: "To an extent" or "To a degree"?

Read the sample student claim and the reasons listed for making this claim. claim: although many people argue that medical testing on animals is a violation of animal rights, the benefits it yields for society far outweigh any argument that can be made. reason #1: animal research has yielded both pain-relieving and life-saving drugs for humans. reason #2: laws prohibit scientists from using animal-based research in cases where non-animal testing would produce equally clear and valid results.

Which answer best explains the consequences of the mass hysteria that took place during the salem witch trails

What difference do you notice between this passage and contemporary pose.