1. Dados os conjuntos A = {1, 3, 4} e B = {- 2, 1}. Então, A x B é:

(A) {(1, - 2), (1, 1), (3, - 2), (3, 1), (4, - 2), (4, 1)}

(B) {(1, - 2), (3, - 2), (4, - 2), (4, 1)}

(C) {(1, 3), (1, 1), (1, 4), (4, 4)}

(D) {(1, - 2), (1, 1), (- 2, - 2)}