6. Determine the power set and the cardinality of the power set of the set A = {x: x= x² + 5x+6=0}
A. (0, A, {1}, {2},{-3), (2, 2), (1, -3), (2,-3}},8
B. (0, A, (1), (2) {-4} {1,4} {1,2,-4}},8
C. (0, A, {1}, {2},{-3}, {1,2}},6
D. None of those