Please help, I would really appreciate it!
The figure shows a line graph and two shaded triangles that are similar:

Which statement about the slope of the line is true? (5 points)

Select one:
a. It is fraction 1 over 2 throughout the line.
b. It is 2 throughout the line.
c. The slope from point O to point A is fraction 1 over 2 time the slope of the line from point A to point B.
d. The slope from point O to point A is two times the slope of the line from point A to point B.