This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to reverse swing a cricket ball
Pick a side of the ball to polish after 5 overs.
Choose one side of the ball to keep polished and shiny. Leave the other side of the ball alone so it develops wear and tear throughout the rest of the match.

Choose your answer from: 1. Sand the inside and outside of the ball after 1 or 2 runs with sandpaper to ensure smooth surfaces. Use a 11 degree grit stone or carpenter's grit to roughen the inside and outside edges.. 2. If 1 side has visible wear on it after 5 overs, polish the opposite side. Gather sweat or saliva from your body.. 3. Make sure your primary goal is polishing your ball, or so people are waiting to see who can hold out the ball for them in a warm-up when they are just starting out. The flank side you measure the area with is your starting point.. 4. Allow time for polish to dry between hits to leave a smooth finish. Hold your racket head-up with the legs extended..
The answer is:
2.