The right answer is "B. something that represents something else"
Symbol is always something that represents something else. The term symbol has Greek origin (sýmbolon), and designates a type of sign in which the concrete reality represents something abstract (as in the case of the cross that represents the Christianity).
Aristotle already stated that one does not think without images. This helps to understand what a symbol is. A symbol is a representation by means of a sign.
