Marvella Has Created a High-Frequency Buzzer That Prevents Dogs from Barking

Marvella has created a high-frequency buzzer that prevents dogs from barking. The moment dogs hear the buzzer's high-pitched squeal, they stop barking. Extensive market testing has shown Marvella that the buzzer works across all breeds and on dogs of all ages. This product can be a lifesaver for people who live in apartment buildings and whose neighbors complain about barking dogs! Marvella should immediately apply for a

A) patent.
B) copyright.
C) trademark.
D) government-sponsored monopoly.
E) noncompete clause.