How can the Engineer perform the key rotation process MOST efficiently?

A company has a compliance requirement to rotate its encryption keys on an annual basis. A Security Engineer needs a process to rotate the KMS Customer Master Keys (CMKs) that were created using imported key material.

How can the Engineer perform the key rotation process MOST efficiently?
A . Create a new CMK, and redirect the existing Key Alias to the new CMK
B . Select the option to auto-rotate the key
C . Upload new key material into the existing CM
E . Create a new CMK, and change the application to point to the new CMK

Answer: A