Which of the following statements is most accurate regarding parental input regarding a possible diagnosis of ASD?

a. Parents' memories are usually unreliable regarding their child's early development.
b. Parents usually overestimate their child's abilities and therefore should be not considered as more important than a clinical assessment.
c. Parents usually underestimate their child's abilities and therefore should be dismissed.
d. Parents' perceptions of their child's difficulties are often accurate and should be addressed in a timely manner.

D