What is true of thread pools when used in a Java Virtual Machine (JVM)?

A.
Once a thread pool is set up. it can be modified only by reinstalling the JVM.

B.
Thread pools are a shared resource generated by workstations connected to the same JVM.

C.
A thread pool is a collection of worker threads that efficiently execute asynchronous callbacks
on behalf of the application.

D.
Thread pools enable components of the server to reuse threads and eliminate the need to
create new threads at run time to service each new request.

Explanation: