A Nurse Assessing a 4-Month-Old Infant Would Expect the Infant

A nurse assessing a 4-month-old infant would expect the infant to do which of the following?

A) Crawl up the stairs.
B) Creep on the floor at least 30 ft.
C) Walk upright with a waddling gait.
D) Hold head at a 90-degree angle while prone.