What is a possible reason for this issue?

A company has decided to use Dell EMC Isilon CloudPools with ECS as the Cloud storage target. During the initial integration, they discover that the ECS namespace is inaccessible.

What is a possible reason for this issue?
A . Incorrect Cloud provider type was selected
B . Object local user is configured as a namespace admin
C . Management user is configured as a user admin
D . ECS bucket was already created

Answer: B