According to Fritz Heider's concept of balance, described in the form of P-O-X triangle, attitude change occurs when -
(A) When all three sides of P-O-X triangle are negative.
(B) When all three sides are positive.
(C) When two sides are positive and one negative.
(D) When two sides are negative and one is positive.
(E) When there is no relation between any side.
Choose the correct answer from the options given below :
(