Which sentence is wrong because it's not parallel?

a) "carl, you are both a dirty rotten liar and terrifically monstrous! " my little brother declared.
b) "carl, you both lie and act like a terrific monster! " my little brother declared.
c) "carl, you are both a dirty rotten liar and a terrific monster! " my little brother declared.
d) "carl, you are both a liar and a monster! " my little brother declared.