In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

There are creatures which, depending on species, have varying numbers of body parts. Arachnids have a certain number, while humans have a different number, and these numerous parts can be attributed to (A) survival (B) environmental growth (C) inherited characteristics (D) developmental abilities
C