Opamp loop stabilty analysis

 

Hi attached here is an electronic DC load circuit. I want to do a loop stability analysis for this circuit. I mean I want to know Phase margin and Gain margin for the feedback loop.

How to do this analysis? I know that I should perform AC analysis but I don't know where should I inject or add the AC signal in the loop. Should I add AC signal at A, B, or C. Also should I ground the opamp inputs? and across what points should I see the output ie bode plot for gain and phase margin?

Please help me with this

Thanks

Santosh