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A large payroll company has merged with a small staffing company, resulting in multiple business units each operating under their own AWS account. To facilitate centralized management of billing and access policies across all accounts, a solutions architect has configured AWS Organizations and sent invitations to all member accounts from a centralized management account. What is the next step the solutions architect should take to achieve centralized control over these accounts?
A
Establish an OrganizationAccountAccess IAM group within each member account, incorporating the requisite IAM roles for administration.
B
Develop an OrganizationAccountAccessPolicy IAM policy in every member account and link these accounts to the management account using cross-account access mechanisms.
C
Set up an OrganizationAccountAccessRole IAM role in each member account, allowing the management account to assume this role and thereby manage permissions.
D
Create an OrganizationAccountAccessRole IAM role within the management account, attach the AdministratorAccess AWS managed policy to it, and assign this role to the administrators across all member accounts.