"FinalEssay", "Birthday2014", and "Attachment_3" are all examples of file extensions.

Which of the following statements is true?

a. Predicate methods typically test a condition and modify the object on which they're called. b. Predicate methods typically do not test a condition and do not modify the object on which they're called. c. Predicate methods typically test a condition and do not modify the object on which they're called. d. Predicate methods typically do not test a condition and modify the object on which they're called.

The function prototype for a correctly-written overloaded assignment operator for a class called Bar might look like this:

A. void operator =( const Bar & right ); B. Bar operator =( const Bar & right ) const; C. inline Bar operator=( const Bar & right ) &; D. Bar & operator=( const Bar & right );