The correct option is
A) They play on reeds.
Step-by-step explanation:
A reed is used to create the vibration necessary to produce sound on most woodwind instruments. The tone of an instrument is determined by the strength, which is represented by a number located on the reed. Higher numbers indicate a stiffer reed. Generally, single reeds are labeled on a scale of 1 to 5 in increments of half sizes and a good reed can make all the difference to a player’s tone.