An administrator analyzes a poorly performing system and suspects that the issue is related to CPU resource. Upon reviewing output of vmstat, the administrator is concerned with the values in the ‘pc’ and ‘ec’ columns. Which definition describes these two headings?（）

A. 'pc' refers to the number of physical processors consumed, while 'ec' refers to the percentage of entitled capacity consumed.
B. 'pc' refers to the 'physical CPUs' and lists how many are left un-allocated, while ec' refers to the 'entitled CPUs' and lists what amount is currently allocated to the LPA
C. 'pc' refers to the 'processor count' and reflects how many CPUs are allocated to the LPAR, while 'ec ' refers to the 'extra capacity' and lists how much above the LPAR entitlement is being consumed.
D. 'pc' refers to 'processor cards' and reflects how many MCM modules are actually being used by this LPAR, while 'ec' refers to the 'entitled CPUs'and lists what amount is currently allocated to the LPA