After drawing the Root-Locus, the closed-loop poles corresponding to a specified value of gain K can be determined from which of the following criterion ?
(A) Magnitude criterion alone
(B) Angle criterion alone
(C) Both Magnitude and Angle criteria
(D) Angle of departure and angle of arrival.
(A) Magnitude criterion alone
(B) Angle criterion alone
(C) Both Magnitude and Angle criteria
(D) Angle of departure and angle of arrival.