Rachel Hears Her Father Say "Ouch!" When He Accidentally Hits

Rachel hears her father say "ouch!" when he accidentally hits his hand with a hammer.For the next several hours,Rachel deliberately tries to imitate the sound of the word ouch.According to the text,approximately how old is Rachel?

A) At least 24 to 28 months old
B) At least 16 to17 months old
C) At least 9 to10 months old
D) At least 4 to 6 months old