The Patient and Her Partner Are Carriers of Sickle-Cell Disease

The patient and her partner are carriers of sickle-cell disease. They are considering prenatal diagnosis with either amniocentesis or chorionic villus sampling (CVS) . Which statements indicate that further teaching is needed on these two diagnostic procedures?

A) "Chorionic villus sampling carries a lower risk of miscarriage."
B) "Amniocentesis can be done earlier in my pregnancy than CVS."
C) "Neither test will conclusively diagnose sickle-cell disease in our baby."
D) "The diagnosis comes sooner if we have CVS, not amniocentesis."
E) "Amniocentesis is more accurate in diagnosis than the CVS."