Which of the following is the correct configuration process of Huawei Oceanstor V3 storage system ?

Which of the following is the correct configuration process of Huawei Oceanstor V3 storage system ?
A . Create storage pool—-create LUN—-add mapping
B . Create storage pool—-add mapping—-create LUN
C . Create LUN—-create storage pool—-add mapping
D . Create LUN—-add mapping—-create storage pool

Answer: A