Which Statement Is True

Which statement is true?

A) Chorionic villus sampling (CVS) is becoming more popular because it provides early diagnosis.
B) Screening for maternal serum alpha-fetoprotein (MSAFP) levels is recommended only for women at risk for neural tube defects.
C) Percutaneous umbilical blood sampling (PUBS) is one of the triple-marker tests for Down syndrome.
D) MSAFP is a screening tool only;it identifies candidates for more definitive procedures.

Correct Answer:

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