What key feature was introduced is Spring 21 release which helps with identifying performance…?

What key feature was introduced is Spring 21 release which helps with identifying performance…?
A . Stagger and Throttle plug-ins for Flows
B. Accurate measure of the CPU time consumption of Flows and Processes
C. Black run-as access for Processes
D. Optimizer plug-in for Flows and Processes

Answer: B