Ava Has Been Reading a Book on Infant Development and Has

Multiple Choice

Ava has been reading a book on infant development and has just read that,on average,babies can roll over at 2 months,and sit up alone at 7 months.The more she reads,the more worried she becomes as she realizes that her daughter is achieving these skills at least one month later than the ages listed in the book.What advice would you give Ava?

A) Wait and see. If her daughter develops the skills, it doesn't matter if she is a bit late.
B) Her daughter is normal, because the average ages are based only on male babies.
C) She needs to take her daughter to a pediatrician right away as her daughter may have a neurological problem.
D) Her daughter is developing normally. The age ranges of motor skill development are more important than the averages.