What recommend should an Architect provide to accomplish this?

Universal Containers (UC) provides shipment tracking for its customers on a custom Shipment object. The .. yearly by the customers should be available on the Account record to the Marketing team, but the Marketing Shipment records.

What recommend should an Architect provide to accomplish this?
A . Public organization-wide default on Shipment, process builder, and lookup relationship to Account.
B. Private organization-Wide default on Shipment, rollup summary, and Master-Detail relationship to Account.
C. Controlled by Parent (Account) on Shipment, trigger, and trigger, and Master-Detail relationship to Account.
D. Private organization-wide default on Shipment, trigger, and Lookup relationship to Account,

Answer: D