The help desk is having difficulty keeping up with all onboarding and offboarding requests. Managers often submit requests for new users at the last minute, causing the help desk to scramble to create accounts across many different interconnected systems. Which of the following solutions would work BEST to assist the help desk with the onboarding and offboarding process while protecting the company's assets?

A. MFA
B. CASB
C. SSO
D. RBAC