A stock lost 8 3/8 points on Monday and then another 1 5/8 points on Tuesday. On Wednesday, it gained 13 points. What was the
net gain or loss of the stock for these three days?
a. a gain of 6 1/2 points
b. a loss of 1 points
c. a gain of 17 1/2 points
d. a gain of 23 points