Explanation:

The Discount Duration field in Salesforce Industries CPQ is specifically used with Contract-Based Discounts. These discounts are tied to a contractual agreement and often span a defined period, such as 12 or 24 months.

✅ Why Contract-Based is correct:
The Discount Duration field defines how long the discount remains active.
It’s typically used in retention, loyalty, or negotiated contract scenarios.
Example: A customer signs a 24-month contract and receives a 15% discount for the full term.

❌ Why the other options are incorrect:

A. Order-Based: These are one-time discounts applied to a specific order or quote. They don’t require a duration field.
B. Account-Based: These apply discounts at the account level but are not governed by a fixed duration unless implemented via custom logic.