TASK DEFINITION: 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.
PROBLEM: Joanne's science teacher cautioned the class to be skeptical when learning about new scientific discoveries. Why is it important to be skeptical about new discoveries in science?
(A) because many scientific discoveries are not based on facts (B) because most scientific discoveries have no scientific value (C) because most scientists make errors when formulating scientific discoveries (D) because all scientific discoveries must be examined critically before they can be accepted

SOLUTION: D

PROBLEM: A human CANNOT survive the loss of which of the following?
(A) The appendix (B) The liver (C) A lung (D) A kidney

SOLUTION: B

PROBLEM: Which method is the safest way to watch an eclipse of the Sun?
(A) Turn away after two or three minutes. (B) Look at the Sun through a long telescope. (C) Cast an image through a pinhole onto a screen. (D) Blink often until your eyes get used to the light.

SOLUTION:
C