Multi-choice problem: Continue writing the next sentence in this paragraph:

How to throw a slider 
Place your index and middle fingers. 
Grip the baseball with your index and middle fingers placed tightly together across an outer seam of the ball located at the horseshoe or u-shape seam. For right-handers, place your middle finger across the right half of the seam.

Available options:
 (A). For left-handers, place your ring and pinky fingers over the seams at the center seam. For most slider pitches, you'll first alternate grip up and down.;
 (B). Left-handers should do the opposite: place your middle finger across the left half of the seam. This should position your fingers towards the outside of the ball (off-center).;
 (C). A lefty can place the middle finger on the left half of the seam, while lefties should place the middle fingers on the inside seam. Position your second and third finger on the opposite seam.;
 (D). For left-handers, place your middle finger across the seam for the momentum to deliver a two-handed slider. Slide your middle finger across the horseshoe seam.;
(B).