Nitrites, a Human-Made Preservative for Meats, and Aflatoxin, a Natural

Nitrites, a human-made preservative for meats, and aflatoxin, a natural product produced by the mold Aspergillus, are similar in that

A) they are converted by the smooth endoplasmic reticulum into a mutagenic substance.
B) they readily lose an amine group to form a unique nitrogenous base.
C) their unmethylated cytosine loses its amino group to form uracil.
D) their thymine bases form covalent bonds with adjacent bases.
E) ultraviolet light distorts their DNA double helix, which interferes with replication.