Seventeen Percent of Spontaneously Aborted Human Fetuses Contain 3 Copies

Seventeen percent of spontaneously aborted human fetuses contain 3 copies of each chromosome, 69 copies in total, in their cells. This could result from which of the following?

A) nondisjunction of all chromosomes in mitosis
B) nondisjunction of all chromosomes in meiosis I
C) nondisjunction of all chromosomes in meiosis II
D) polyspermy
E) failure to extrude one of the polar bodies during oogenesis