All of the Following Might Be Reasons to Use Parental

All of the following might be reasons to use parental reports instead of researchers' measures except

A) parents have a wider range of experience observing their infants
B) parents tend to be more objective about their infants' behavior
C) parents are unlikely to elicit wariness or unusual behavior in their infants
D) parents can be trained to keep diaries about their infants' development, noting when a particular behavioral milestone is achieved