This question has multiple correct answers about process schedulers. Select all correct answers.

A$.$Long$-$term scheduler is also called the "dispatcher".

B$.$Short$-$term scheduler is invoked frequently in milliseconds and long$-$term scheduler is invoked infrequently.

C$.$Medium term scheduler allocates CPU to the processes that are blocked and hence those processing can run immediately.

D$.$Short$-$term scheduler makes sure that the system has a balance workload in terms of CPU usage.

E$.$Long$-$term scheduler controls the degree of multi$-$programming in the operating system.