The slope ab is -4
which segments are parallel to ab?
select each correct answer.

a. jk, where j is at (8, 2) and k is at (12, 3)
b. cd, where c is at (6, 2) and d is at (4, 10)
c. ef, where e is at (1, 9) and f is at (2, 5)
d. gh, where g is at (1, 0) and h is at (1, 4)