The correct answer is: B. Bode
Bode plots are used to analyze the frequency response of a system. They can be used to determine the stability of a system, as well as the magnitude and phase of the system’s response to a sinusoidal input.
Root locus plots are used to analyze the stability of a system. They show the location of the roots of the system’s characteristic equation as a function of a system parameter.
Nyquist plots are used to analyze the stability of a system. They show the relationship between the magnitude and phase of the system’s transfer function as a function of frequency.
Nichols charts are used to analyze the stability of a system. They show the relationship between the gain and phase margin of a system as a function of frequency.
In conclusion, Bode plots are the best technique to use to analyze the transient and stability response of a system.