Which of the Following Statements Is False

Which of the following statements is false?

A) Regular expressions are specially formatted strings that are used to find patterns in text.
B) Regular expressions can be used to validate data to ensure that it is in a particular format.
C) The regex library algorithm regex_search, returns true if any part of an arbitrary string matches the regular expression.
D) Character classes can be used with regular expressions. Character classes are C++ classes with escape sequences that represent groups of characters that might appear in a string.