Where would UC apply an Entitlement record to track the specific Service Contract SLAS?

Universal Containers (UC) uses Service Contract based Entitlements to determine their Service Level Agreements. UC would like to track adherence to Service Contract SLAS.

Where would UC apply an Entitlement record to track the specific Service Contract SLAS?
A . Work Order Line Items
B . Service Contract
C . Work Order
D . Account

Answer: D