What issue with public cloud leads some companies to move workloads back on-premises?

What issue with public cloud leads some companies to move workloads back on-premises?

A. Limited scalability
B. Time consuming manual configuration
C. Underutilized resources

D. Lack of control

Reference: https://www.hpe.com/us/en/insights/articles/decision-guide-public-cloud-versus-on-prem-storage-1701.html