When Five-Year-Old Roger Began First Grade, His Teacher and Parents

When five-year-old Roger began first grade, his teacher and parents noticed that he reversed his letters, writing "d" when he meant "b." What would we expect Roger's reading skills to be like at age ten?

A) This early sign of mental retardation indicates that Roger may never learn to read.
B) This early sign of dyslexia suggests that Roger will have difficulty learning to read.
C) This early sign of emotional problems suggests that Roger is having difficulty adjusting to school and may be diagnosed as hyperactive by age ten.
D) Based on this sign, there is no reason to suspect that Roger will have difficulty learning to read or doing well in school.