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.

Q: Which is a hypothesis that can be easily tested?  
 (A) The Moon causes high tides. (B) During which season are the tides the highest? (C) What is the phase of the Moon when tides are highest? (D) When the Moon is full, the tides will be at their highest.

A: D
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Q: What are the products in the reaction shown below? HCl + NaOH ->  
 (A) Na + Cl_{2} (B) NaCL + OH (C) NaOH + Cl (D) NaCl + H_{2}O

A: D
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Q: A student has a pink eraser on her desk. Which property shows that the eraser is a solid?  
 (A) Its color stays the same when it is broken in half. (B) Its temperature goes up when it is rubbed on paper. (C) Its shape is definite when it is placed in a new spot. (D) Its size changes when it is used to remove pencil marks.

A:
C
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