Juan made the following bar graph shown to represent the relative distances of four different astronomical bodies from earth. the title of the bar graph is distance of bodies in space from earth. four bars are labeled a, b, c, and d. bar c is the shortest. bar d is about three times the size of bar c. bar a is about six times the size of bar c. bar b is about eight times the size of bar c. if d represents mars, which of the following could be represented by b and c?