Which two statements about Cisco FlexStack and FlexStack+ are true?

Which two statements about Cisco FlexStack and FlexStack+ are true? (Choose two.)

A.
FlexStack and FlexStack+ are available on Cisco Small Business Switches.

B.
FlexStack and FlexStack+ switches are cross-compatible.

C.
FlexStack and FlexStack* compatibility is planned for a future release.

D.
FlexStack and FlexStack+ switches are not compatible.

E.
You can stack up to eight switches in a mixed FlexStack and FlexStack+ environment.

F.
You can stack up to four switches in a mixed FlexStack and FlexStack+ environment.

Explanation:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12995/white_paper_c11-728327.html

FlexStack-Plus is backward compatible with 2960-S and FlexStack. Mixing 2960-X and 2960-S
members in a stack is supported. When the stack membership is mixed with 2960-X and 2960-S
models, FlexStack-Plus falls back to FlexStack capabilities of 40Gbps stack bandwidth and four
members maximum per stack.