What Is Needed in Determining to Assess Whether a Nondisjunction

What is needed in determining to assess whether a nondisjunction event occurred at meiosis I or meiosis II?

A) The karyotype
B) Whether the abnormal gamete contributed two copies of the same chromosome or one of each homolog
C) The parent of origin of the nondisjunction
D) Whether or not recombination occurred between the homologs of the nondisjoined chromosome
E) Cannot be determined