Pre algebra question about slope!

alec calculated the slope of line ac between points a and b. avis calculated the slope of line ac between points b and c. both alec and avis drew triangles, as shown below, to calculate the slopes:

which statement is correct about the slopes calculated by alec and avis if both calculated the slopes accurately?

(a.) both calculated the slope as 3.
(b.) both calculated the slope as 1 over 3.
(c.) alec calculated the slope as 1 over 3 and avis calculated it as 3.
(d.) alec calculated the slope as 3 and avis calculated it as1 over 3.