Which of the following statements is correct?

a. When using on-premises solutions, maintenance or upgrade projects may even go by unnoticed.

b. An important advantage of cloud-based solutions concerns the scalability and economies of scale offered. More capacity (e.g., servers) can be added on the fly whenever needed.

c. The big footprint access to data management and analytics capabilities is a serious drawback of cloud-based solutions.

d. On-premises solutions catalyze improved collaboration across business departments and geographical locations.