1. Let 2*; be a preference over some consumption set X, and >- be the corresponding strict preference. Which of the following situations may be true in the utility maximization model? (A) a: >_- y >_- z >_- m; (B) eryandytx; (C) a: >- y >- z >- 3:; (D) none of the above. 2. Let >_- be a preference over some consumption set X , N be the corresponding indifference, and '2' the incomparsbility relation. Web of the following situations may be true in the utility maximization model? (A) .1: ~ y ~ 3 >- 2:; (B) I ~ I; and y >- z: (0) =0?!\" (D) none of the above. 3. Let C be a choice function. Which of the following situations CANNOT be true in the utilityr maximization model? (A) 612.1:ng = I and C(y. 3) = y; (B) C($,y,z) = z and C(yl 3) = y; (C) may. 3} = y and Cir: 2) = y; (D) all of the above