When individual activities within a cost pool have a similar relationship with the cost$$ driver, which of the following could be said about the cost$$ pool?

A$.$ the cost pool is considered contains only direct variable costs

B$.$ the costs accumulated in the cost pool are not used for customer$$profitability analysis

C$.$ there is a need for need multiple cost drivers to allocate costs from the pool to customers

D$.$ the cost pool is considered a homogeneous cost pool