Cindy and Dave Are Thrilled That Baby John Has Learned

Cindy and Dave are thrilled that baby John has learned to take a few shaky steps on his own when he is only 9 months old. His older brother Alex didn't learn to do that until he was 19 months old. Is John really a wonder child?

A) Yes. This is very early to learn to walk.
B) Yes. This is very early to learn to walk, but they should worry about Alex, who seems far behind the normal rate of development.
C) No. But they should worry about Alex, who seems to be very far behind the normal rate of development.
D) No. John and Alex are still within the normal range for learning to walk.