Tympanostomy tubes are meant to ______.

A．tympanostomies were never performed.
B．tonsillectomies were done too frequently.
C．there were too few American pediatricians.
D．American children had fewer ear infections.

A．children never benefit from ear surgery.
B．tympanostomy tubes result in deafness.
C．some surgeons are too eager to operate.
D．ear tube operations are too expensive.