Given the task definition and input, reply with output. You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

A student found a worm under some leaves and wrote observations about the worm in a notebook. Which is a fact that could be found in the student's notebook?
(A) The worm feels cold. (B) The worm is a heterotroph. (C) The worm has 33 segments. (D) The worm has a four-chambered heart.
C