Research Suggests That Song Development in Sparrows Consists of Two

Multiple Choice

Research suggests that song development in sparrows consists of two phases: a sensory phase and a sensorimotor phase. During the sensorimotor phase, a male bird

A) does not yet rehearse songs he has heard.
B) learns songs and stores them in memory.
C) produces only subsong.
D) rehearses a song and matches it to sounds he memorized earlier.