Under what circumstance(s)is it recommended that a woman undergo amniocentesis?

A) The woman will be 25 years of age or older at the time of birth.
B) The woman has not had a previous child with a chromosomal aberration.
C) Either parent has a known structurally abnormal chromosome.
D) The father will be 35 years of age or older at the time of the birth.
E) The parents want to have a karyotype of their child.