Which of the following is not a valid C++ identifier?

The essence of the ________ approach is the ability to execute instructions independently and concurrently in different pipelines.

A. scalar B. branch C. superscalar D. flow dependency

A static local variable is one

A) whose value never changes. B) whose value is retained between function calls. C) with the same name as a global variable. D) whose scope is limited to the function it is defined in. E) that is reinitialized each time the function it is defined in is called.