What Is a Possible Cause of the Chromosomal Aberration Called

Multiple Choice

What is a possible cause of the chromosomal aberration called a "duplication"?

A) unequal crossing over
B) exchange between non-homologous chromosomes
C) a chromosome fragment that breaks off and does not rejoin any chromosome
D) breaking of a chromosome fragment, then rejoining in a flipped orientation
E) nondisjunction