In cloud computing, how does a business benefit by the ability to scale resources on demand.

A$.$ Having a $3$rd party to manage service delivery allows the business to lower staffing costs.

B$.$ It is more cost effective to pay for resources used rather than having to pay for resources capable of meeting peak demand at all times.

C$.$ Fewer in$-$house servers reduce power costs in the business$$ data center.

D$.$ Shorter contracts and less capital expense reduce expenses of the IT department.