A customer has a Dell EMC Unity 550F with a single pool consisting of 10 drives configured as a RAID 5 (4+1) configuration. What is the minimum amount of drives required to expand the pool?
A. 1
B. 5
C. 6
D. 10
Reference: https://www.emc.com/dam/uwaem/documentation/unity-p-pool-config.pdf (42)