A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system

(A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1.

(C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1

(A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1.

(C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1