Which one of the following statements is correct? Nichol's chart is useful for the detailed study analysis of:

Close loop and open loop frequency responses

Which one of the following statements is correct? Nichol's chart is us

1.	Which one of the following statements is correct? Nichol's chart is useful for the detailed study analysis of:
A.	Closed loop frequency response
B.	Open loop frequency response
C.	Close loop and open loop frequency responses
D.	None of the above
Answer» B. Open loop frequency response