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.
--------
Question: Scientists found a new species of a complex organism at the bottom of the ocean. The organism most likely
(A) is unicellular. (B) is a form of bacteria. (C) is made of multiple cells. (D) lacks an organized nucleus.

Answer: C

Question: Mrs. Tucker gives her class samples of different soil types. Which action best helps Tanisha identify each soil type?
(A) smelling it (B) touching it (C) weighing it (D) measuring it

Answer: B

Question: Many desert animals are only active at night. How does being active only at night most help them survive in a hot desert climate?
(A) They can see insects that light up at night. (B) Their bodies lose less water in the cool night air. (C) They are able to find more plant food by moonlight. (D) Their bodies absorb sunlight in the daytime while they sleep.

Answer:
B