Upon examination of a zygote, a developmental biologist discovers that it possesses 69 chromosomes. What does this indicate?

A)The zygote resulted from polyspermy (multiple fertilizations of the same oocyte)by two sperm cells
B)The zygote is a normal, healthy diploid zygote
C)Either the sperm or the egg received an extra chromosome as the result of a meiotic error
D)Either the sperm or the egg received an extra sex chromosome as the result of a meiotic error