Your current checkpoint Enterprise consists of one Management Server and Four Gateways in four different locations with the following versions.
All devices are running secure platform. You are upgrading your enterprise to R71.

Place the required tasks from the following list in the correct order for upgrading your enterprise to R71.

1) Upgrade all gateways to R71
2) Upgrade all gateways 3 and 4 to R 65
3) Upgrade all gateways 2, 3, and 4 to R 65
4) Upgrade all gateway 4 to R 65
5) Perform pre-upgrade verifier on Security management server
6) Perform pre-upgrade verifier on all Gateways
7) Perform License upgrade checker on Gateway 2
8) Perform License upgrade checker on Gateway 3
9) Perform License upgrade checker on Gateway 4
10) Perform License upgrade checker on Security Management Server
11) Perform License upgrade checker on all devices
12) Upgrade security management server to R 70

A.
11, 5, 12, 3, 1

B.
9, 4, 5, 12, 1

C.
5, 6, 12, 1

D.
11, 5, 12, 2, 1