Which command implements the AppRole authentication method?

Vault authentication methods are enabled with the vault auth enable command. Since the required authentication method is AppRole, the correct command is vault auth enable approle. AppRole is designed for machine and application authentication, where a workload authenticates using a RoleID and SecretID pattern. Option B is invalid modern Vault syntax; vault mount is not the command used to enable auth methods. Option C is also incorrect because mount enable is not the proper command structure. Option D is incomplete and does not specify the auth command group. HashiCorp’s AppRole and operations quick-start documentation show AppRole being enabled with vault auth enable approle, which directly matches option A.

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