Marty Is Developing Rapidly in Her Size and Abilities to Sit

Multiple Choice

Marty is developing rapidly in her size and abilities to sit and stand.Many of the reflexes with which she was born are fading,but she is not yet able to climb or ride on riding toys.Marty is probably in the __________ of life.

A) first year
B) second year
C) proximodistal period
D) reflexive development phase