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: Which of the following activities should be omitted from scientific inquiry?  
 (A) changing data to fit expected results (B) designing and carrying out investigations (C) formulating detailed hypotheses (D) communicating results to others

SOLUTION: A

PROBLEM: Which of the following actions will increase the gravitational force between two masses, m_{1} and m_{2}, by the greatest amount?  
 (A) Halve the mass of m_{1} and halve the distance between m_{1} and m_{2}. (B) Halve the mass of m_{1} and double the distance between m_{1} and m_{2}. (C) Double the mass of m_{1} and halve the distance between m_{1} and m_{2}. (D) Double the mass of m_{1} and double the distance between m_{1} and m_{2}.

SOLUTION: C

PROBLEM: Few flowers are able to grow on the northern arctic tundra. Those that do grow there have very short stems. How is this an adaptation to help them survive in the arctic climate?  
 (A) It protects them from freezing. (B) It prevents them from being eaten by consumers. (C) It protects them from breaking in strong winds. (D) It makes it very hard for them to be pulled from the ground.

SOLUTION:
C