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 euglena cell has a structure called an eyespot that detects light. A paramecium does not have an eyespot, and so it cannot detect light. Why doesn't a paramecium need an eyespot?
(A) A paramecium does not live where there is light. (B) A paramecium does not photosynthesize its own food. (C) A paramecium lives in shallower water than a euglena. (D) A paramecium uses cilia instead of a flagellum to move.
B