What is the difference between an opinion and a theory? a. a theory is a set of true statements forming a framework for understanding, and an opinion can be defended, but it is not necessarily universally true. b. an opinion is a set of true statements forming a framework for understanding, and a theory can be defended, but it is not necessarily universally true. c. a theory is true, and an opinion is false. d. a theory is subjective, and an opinion is objective. select the best answer from the choices provided a b c d