**4) What is the effect of negative feedback when applied to an amplifier? If an amplifier has a gain of 200 and this produces oscillations, what will be the feedback factor?**

ive given the following answers to the first bit of the question but im stuck on the feedback factor bit, any help would be much apreciated.

Negative feedback on a amplifier cause:

A) Reduction in gain

B) Reduction of distortion

C) Increase in gain stability

D) Increase in Bandwidth

E) Increase in input resistance