In the Assessment of a 1-Month-Old Infant, the Nurse Notices

In the assessment of a 1-month-old infant, the nurse notices a lack of response to noise or stimulation. The mother reports that in the last week he has been sleeping all of the time, and when he is awake all he does is cry. The nurse hears that the infant's cries are very high pitched and shrill. What is the most appropriate response by the nurse?

A) Refer the infant for further testing.
B) Talk with the mother about eating habits.
C) Do nothing; these are expected findings for an infant this age.
D) Tell the mother to bring the baby back in 1 week for a recheck.