If a method does not catch an exception, then it must at least warn programmers that any invocation of the method might possibly throw an exception. This warning is called a/an:

A __________ system is a set of interrelated subsystems.

A. secondary B. hierarchical C. complex D. functional

The extraction operator stops removing characters from the cin object when it encounters which of the following?

A. letter B. number C. white-space character D. none of the above