Write the next sentence in the following story.

How to whistle using an acorn cap
Find an acorn cap.
This is the brown part on top of the acorn. Make sure it is not cracked or deformed.

Possible answers:
A). Otherwise, it will not hold the whistle correctly. Read the instructions on the acorn cap itself..
B). Also the larger the acorn cap the lower the pitch. Grab the acorn cap in both of your hands between your thumb and index finger with the inside of the cap facing you..
C). Fit your finger between the part of the acorn cap and the nose of the acorn cap. Your finger must have a smooth top of course, as blueberries do not do well with rough edges..
D). The acorn cap will give you a better position to whistle. Place the stem of the garden pipe in the middle of the center of the acorn cap... The answer should be
B).