A company uses AWS Organizations to manage multiple AWS accounts with consolidated billing enabled.
Organization member account owners want the benefits of Reserved Instances (RIs) but do not want to share RIs with other accounts.
Which solution will meet these requirements?

A. Purchase RIs in individual member accounts. Disable RI discount sharing in the management account.
B. Purchase RIs in individual member accounts. Disable RI discount sharing in the member accounts.
C. Purchase RIs in the management account. Disable RI discount sharing in the management account.
D. Purchase RIs in the management account. Disable RI discount sharing in the member accounts.