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You have data stored in both Cloud Storage and BigQuery datasets within Google Cloud Platform. Your goal is to secure this data by implementing three distinct access levels: administrator, read/write, and read-only, adhering to Google's recommended practices. What is the best approach to achieve this?
A
At the Project level, assign the Owner role to administrator accounts, the Editor role to read/write accounts, and the Viewer role to read-only accounts.
B
Utilize predefined IAM roles for Cloud Storage and BigQuery that match the required access levels. Assign users to these roles based on their access needs for each service.
C
At the Organization level, grant the Owner role to administrator accounts, the Editor role to read/write accounts, and the Viewer role to read-only accounts.
D
Develop three custom IAM roles with tailored policies for the necessary access levels in Cloud Storage and BigQuery. Then, assign users to the appropriate custom roles.