The AAA Cable Company uses this graph to compare their costs to the costs of a competitor. The competitor charges a $20 installation fee and $1.10 per day. AAA Cable has no installation fee and charges $1.30 per day. Cable Company Rates
A graph titled Cable Company Rates has Time (days) on the x-axis, and Cost (dollars) on the y-axis, from 0 to 45 in increments of 5. A line titled Our cost goes through (4, 5) and (8, 10). A line titled Their cost goes through (0, 20) and (4, 25).

What can be done to make this graph less misleading?

a.
Change the vertical scale to increments of $10 instead of increments of $5.
b.
Change the horizontal scale to increments of 10 days instead of increments of 1 day.
c.
Change the vertical scale to increments of $1 instead of increments of $5.
d.
Change the horizontal scale to increments of One-half days instead of increments of 1 day.