Which of the following BEST addresses the problem best address the problem with the least amount of administrative effort?

Over the last 90 days, many storage services has been exposed in the cloud services environments, and the security team does not have the ability to see is creating these instance. Shadow IT is creating data services and instances faster than the small security team can keep up with them. The Chief information security Officer (CIASO) has asked the security officer (CISO) has asked the security lead architect to architect to recommend solutions to this problem.

Which of the following BEST addresses the problem best address the problem with the least amount of administrative effort?
A . Compile a list of firewall requests and compare than against interesting cloud services.
B . Implement a CASB solution and track cloud service use cases for greater visibility.
C . Implement a user-behavior system to associate user events and cloud service creation events.
D . Capture all log and feed then to a SIEM and then for cloud service events

Answer: C