What is a valid bandwidth limit setting for this cascaded Storage Group?

A VMAX3 parent Storage Group (SG) contains two child SGs: SG1 and SG2.

What is a valid bandwidth limit setting for this cascaded Storage Group?
A . Parent SG – 400; SG1 – 500; SG2 – 200
B . Parent SG – 400; SG1 – 500; SG2 – NOLIMIT
C . Parent SG – 500; SG1 – 500; SG2 – 400
D . Parent SG – 500; SG1 – NOLIMIT; SG2 – 1000

Answer: C