Which are the best practices for attack mitigations?

Which are the best practices for attack mitigations?

A.
CK2, CK5, CK6 and CK8

B.
CK3, CK4, CK6 and CK7

C.
CK1, CK2, CK3 and CK5

D.
CK2, CK5, CK6 and CK7

E.
CK2, CK3, CK6 and CK8