The correct answer is C. streams.

A stream is a sequence of characters that can be read or written. In C++, streams are used to perform standard input and output operations. The standard input stream is called stdin, and the standard output stream is called stdout.

Characters are individual letters, numbers, and symbols. Sequences are a series of characters. Tests are used to check the condition of a variable or expression.

Here is an example of how to use a

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