Which of the following statements is true of theories?

A) Theories can only be expressed as mathematical formulae.
B) Theories are supported by proving a fact.
C) Theories can be reevaluated.
D) Theories are proven by confirming a prediction.

Theories

Systematic, organized sets of concepts and propositions that are designed to explain and predict phenomena within certain variables.

Mathematical Formulae

Standardized equations or expressions used to solve problems or represent theories and relationships in mathematics.