Write the next sentence in the following story.

How to use the empirical rule
Draw out and divide a bell curve.
Sketch out a normal curve, where the highest point is in the middle, and the ends slope down and taper off symmetrically to the left and right. Next, draw several vertical lines intersecting the curve :
1 line should divide the curve in half.

Choose from: A. The other should pass through 1 part with a curved stem. The second line should run parallel and at a left angle.. B. Draw a curved curve to equal the curve in the middle. 3 lines should play into the curve at random, so don't overdraw.. C. Draw up one line with the highest point as the point and four horizontal lines intersect on the outside edge. 2 lines should connect the right and left edges of the curve.. D. Draw 3 lines to the right of this middle line, and 3 more to the left. These should divide each of the curve's halves into 3 evenly spaced sections and one tiny section at the tip... The answer should be
D.