What does EMC recommend when configuring the number and size of each LUN in the reserved LUN pool when the rate of change is unknown?

A.
Create an equal number of reserved LUNs as source LUNs that are 10% of the largest source LUN

B.
Create an equal number of reserved LUNs as source LUNs that are 20% of the smallest source LUN

C.
Create double the number of reserved LUNs as source LUNs that are 10% of the average source LUN size

D.
Create double the number of reserved LUNs as source LUNs that are 20% of the average source LUN size