Which of the Following Best Describes the "Thomas Theorem"-A Saying

Which of the following best describes the "Thomas Theorem"-a saying attributed to sociologist W.I.Thomas?

A) "With great power comes greater responsibility."
B) "The more wealthy a society becomes,the less likely they are to achieve class consciousness."
C) "He who has the most money makes the rules."
D) "If men define situations as real,they are real in their consequences."