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Your company has launched a social media app named ‘Pony’, which consists of multiple sub-applications deployed on Compute Engine within the same GCP project. What is the best method to assign specific permissions to each instance that interacts with Google Cloud APIs?
A
Assign a unique service account to each instance for precise access control.
B
Specify the service account name through instance metadata during creation.
C
Use the gcloud compute instances update command post-creation to assign a service account to each instance.
D
Post-creation, utilize the gcloud compute instances update command to add the service account name as instance metadata.