The scenario requires a pure make-to-order (MTO) process for the finished product, as forecasting is explicitly not possible. Planning Strategy 20 (Make-to-Order Production) is the standard SAP strategy for this, where production is triggered directly by a sales order.

The different procurement methods for the components are controlled by the Individual/Collective indicator in the MRP 4 view of each component's material master. To procure one component individually for the sales order, its indicator is set to '1' (Individual). To procure the other component jointly for plant stock, its indicator is set to '2' (Collective).

A. Planning strategy 50 is a make-to-stock (MTS) strategy that requires forecasting (Planned Independent Requirements) for the finished product, which the scenario prohibits.

B. The Mixed MRP indicator is used to define if a material's requirements are planned collectively even in an MTO scenario, but the primary control for components within a BOM is the Individual/Collective indicator.

C. This option is incorrect because planning strategy 50 requires forecasting, and the Mixed MRP indicator is not the correct control for differentiating component procurement types within a single BOM.

1. SAP S/4HANA Help Portal, "Make-to-Order Production (20)": This document states, "This strategy is a typical make-to-order strategy... Planned independent requirements are not relevant for this strategy." This confirms that Strategy 20 is appropriate when forecasting is not possible.

2. SAP S/4HANA Help Portal, "Individual and Collective Requirements": This official documentation specifies, "You use this indicator [Individual/Collective] to specify for a component whether it is to be planned as an individual requirement or as a collective requirement... If you want to plan a component as an individual requirement, you must set the indicator to 1... If you want to plan a component as a collective requirement, you must set the indicator to 2." This directly supports using this indicator to fulfill the component-level requirements.

3. SAP Learning Course Material, TS422 (Production Planning in SAP S/4HANA): Unit 4, "Make-to-Order Production," details the use of Strategy 20 for sales-order-driven production. The same unit explains how the Individual/Collective indicator in the component material master (MRP 4 view) determines whether dependent requirements are managed in sales order stock (individual) or plant-available stock (collective).