Answer:
C. It is cannot be proven.
Step-by-step explanation:
In answering this assignment, it is important to note that a thesis is a main idea, opinion or theory of a writer or speaker, who then attempts to prove it. Hence, the statement above that A Raisin in the Sun is the best play of all time does not fit to be a thesis as it cannot be proven. This is because various plays take various forms and are meant for various audiences and hence by saying that A Raisin in the Sun is the best play of all time cannot be proven. Therefore, these are the key factors to consider in answering this assignment.