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.

Ex Input:
A scientist will repeat an investigation many times before finally making a conclusion. Which reason best explains why a scientist repeats an investigation?  
 (A) Repetition is needed to prove a hypothesis. (B) Repetition is required to publish a conclusion. (C) Repetition ensures the accuracy of obtained data. (D) Repetition helps scientists remain objective about observations.

Ex Output:
C


Ex Input:
Which would best help a forest animal avoid being eaten by hawks or owls?  
 (A) small size (B) sharp claws (C) bright color (D) underground home

Ex Output:
D


Ex Input:
Which event occurs on a daily cycle?  
 (A) The Sun rises and sets. (B) Earth tilts on its axis. (C) Earth revolves around the Sun. (D) The Moon revolves around Earth.

Ex Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A


