Which three statements are true about Discount Lists?

Users can define discounts for configurable models on Discount Lists.

Discount rules can be defined at multiple levels: the root item, the components, or the entire configuration.

Discount rules can be defined at the root level only.

Tier and attribute-based adjustments are supported only at the root item level.

Tier and attribute-based adjustments are supported at multiple levels: the root item, the components, or the entire configuration.