In a system with a negative feedback loop, how does the overall gain behave when the gain of the feedback path is positive?

Correct option is B

​$$\text{In a negative feedback system, the closed-loop gain is given by:} \\[6pt]A_f = \frac{A}{1 + A\beta} \\[8pt]\text{where:} \\[4pt]\bullet \ A = \text{ open-loop gain} \\[2pt]\bullet \ \beta = \text{ feedback path gain (positive in this case)} \\[8pt]\text{Because the feedback is negative, the term } 1 + A\beta \text{ appears in the denominator.} \\[6pt]\text{As long as } \beta > 0: \\[6pt]\bullet \ \text{The denominator increases} \\[2pt]\bullet \ \text{The overall (closed-loop) gain decreases} \\[8pt]\text{This reduction in gain improves stability, linearity, and bandwidth, which is why negative feedback is widely used.}$$​​