Comprehensive and Detailed In-Depth Explanation:
In decentralized EWM, some document categories can be bypassed, but option A ("An outbound delivery order and an outbound delivery") is mandatory because the outbound delivery order (ODO) is created in EWM from an ERP outbound delivery request, and the outbound delivery is completed after processing, configured in SPRO: SCM Extended Warehouse Management > Goods Issue Process > Outbound Delivery. Other combinations (B, C, D) can be optional or situational.