Your company experiences steep spikes in required storage space at the end of each month when the sales database is tasked with running sales reports. Fortunately, the database service and storage were moved off local servers and are now hosted in the cloud. The company's cloud administrator has configured the hosted service to scale up available storage space automatically when the database needs it$.$ The hosted service can also scale down storage space when the reporting is finished.

Which of the following cloud computing features provides scaling of storage?

a$.$ Measured service

b$.$ Metered service

c$.$ Rapid elasticity

d$.$ Resource pooling