Answer:
Option C, functional theory
Step-by-step explanation:
Daniel Katz proposed the theory of "functionalist theory of attitudes". He was the first to postulate that the attitude of an individual is derived from the functions he/she performs in a society in order to achieve their goals.
According to Mr. Katz, the attitude of a person changes with the change in the purpose of his/her function or with the change of the function itself. At this point , a person feels blocked or frustrated. Therefore, it is essential for all to know that the attitude of a person cannot be changed by information or by perception but by changing his/her underlying motivational and personality needs
Hence, option C is correct