A 4yearold girl is referred to the genetics clinic to be evaluated because she may have fragile X syndrome. During the appointment, the patient's mother provides information on the family history. Which of the following statements about her daughter's family history is MOST suggestive of fragile X syndrome?
A. "Her maternal grandmother went through menopause early."
B. "Her paternal grandfather and his brother have tremors."
C. "Her father completed the 9th grade and then dropped out." D. "Her maternal uncle has a son with autism."