5. The word "subjected" in line 9 is closest in meaning to (A) reduced (B) modified (C) exposed (D) imitated

10.What does the passage mainly discuss? (A) How babies differentiate between the sound of the human voice and other sounds (B) The differences between a baby's and an adult's ability to comprehend language (C) How babies perceive and respond to the human voice in their earliest stages of language development (D) The response of babies to sounds other than the human voice