In SAP S/4HANA Transportation Management, to plan freight units with multiple stages and assign different carriers to each stage, you define the carriers in thetransportation lane (C). According to the SAP documentation, transportation lanes specify the valid carriers for specific routes or stages, including multi-leg scenarios. By configuring different carriers for each stage within the transportation lane, the system ensures that the appropriate carrier is assigned during planning for each leg of the transport.

The other options are incorrect:

Schedule (A)defines departure times and carriers for regular transports but is not used for stage-specific carrier assignments in freight units.

Default route (B)is used for simplified routing but does not support detailed stage-specific carrier assignments.

Carrier profile (D)contains carrier attributes but does not define stage-specific assignments for freight units.