A Couple Brings Their Child to His Primary Care Provider

A couple brings their child to his primary care provider for a checkup.The child has Down syndrome,and the couple is concerned about other diseases that could afflict the child.The primary care provider explains that young children with Down syndrome are at higher risk for developing:

A) Nephroblastoma
B) Rhabdomyosarcoma
C) Leukemia
D) Retinoblastoma