In SAP S/4HANA Transportation Management, the cost distribution function allows transportation costs to be included in the material valuation, typically through integration with Materials Management (MM). According to the SAP documentation, the following documents support this requirement:

Purchase order (B): Purchase orders can include transportation costs as part of the procurement process, enabling these costs to be distributed to the material valuation in MM.

Stock transport order (C): Stock transport orders, used for inter-plant or inter-company stock transfers, support the inclusion of transportation costs in the material valuation, as these costs are relevant to the transfer process.

Inbound delivery (E): Inbound deliveries, which represent the receipt of goods, can incorporate transportation costs from freight settlement documents, allowing these costs to be distributed to the material valuation.

The other options are incorrect:

Sales order (A)is used in sales and distribution to trigger transportation requirements but does not directly support cost distribution for material valuation.

Outbound delivery (D)is relevant for shipping goods but is not typically used to distribute transportation costs to material valuation, as this is more applicable to inbound processes.