Which two cache replacement configurations are allowed? (Choose two.)
A. matching the number and size of cache DIMMs on both controllers
B. replacing two 128 MB DIMMs with one 256 MB DIMM on one controller
C. replacing two 128 MB DIMMs with one 256 MB DIMM on both controllers
D. replacing one 128 MB DIMM on one controller with 256 MB, while keeping the other controller at 128 MB