Clarissa's Mother Was 38 Years Old When She Gave Birth

Multiple Choice

Clarissa's mother was 38 years old when she gave birth to her. Clarissa suffers from an intellectual disability, and doctors have diagnosed that her condition is due to the extra chromosome that she received at the time of conception. Identify the condition afflicting Clarissa.

A) Phenylketonuria
B) Sickle-cell anemia
C) Tay-Sachs disease
D) Down syndrome