Which BEST describes the different mechanisms of mitoxantrone and carboplatin?

a. Mitoxantrone causes DNA strands to bind to each other, and carboplatin causes DNA to break.
b. Mitoxantrone causes DNA to break, and carboplatin causes DNA strands to bind to each other.
c. Mitoxantrone inhibits the process of cell division, and carboplatin blocks hormones for cell growth.
d. Mitoxantrone blocks hormones for cell growth, and carboplatin inhibits the process of cell division.