Peng Is Worried About What Might Be Upsetting His 1-Month-Old

Multiple Choice

Peng is worried about what might be upsetting his 1-month-old son,who seems to have an angry expression on his face.You could help by telling him that a negative facial expression on a baby his son's age is far more likely to be expressing _____,because babies cannot express anger until they are _____ old.

A) pain; 2 months
B) fear; 2 months
C) pain; 6 months
D) fear; 6 months