Directions: In the given question, the sentence has four underlined words or phrases. Identify the one underlined word or phrase that must be changed in order for the sentence to be grammatically correct. Mark (E) for no error.
The most well-known sonatas of the classical and romantic periods use one instrument, most often the piano; duo sonatas such as the Kreuzer — which uses two instruments, perhaps a violin along with the piano — are relatively few in number.