In Professor Meanscore's Class, the First Midterm Exam and the Second

Multiple Choice

In Professor Meanscore's class, the first midterm exam and the second midterm exam are weighted equally toward the final grade.With the first midterm's score on the horizontal axis, and the second midterm's score on the vertical axis, indifference curves between the two exam scores are

A) L-shaped with lines extending upward and to the right.
B) L-shaped with lines extending downward and to the left.
C) parabola shaped.
D) straight lines with slope 21.
E) straight lines with slope 2.