TOEFL Reading: ETS-TOEFL阅读机经 - 13KYASN439I1P613L$

According to paragraph 4, which of the following statements about directed reaching is true A. Directed reaching behaviors have typically developed by the time an infant is about two months old. B. Directed reaching behaviors do not appear until an infant is able to account for the movement of an object. C. Directed reaching is the earliest form of reaching behavior that infants develop. D. Directed reaching is controlled both by the visual system and by proprioception.