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]: A student poured water into a plastic tray. The student then put the tray into the freezer. What property of the water changed as the water froze?  
 (A) The water became a gas. (B) The mass of water increased. (C) The water took a definite shape. (D) The flavor of the water changed.
[A]: C


[Q]: What causes a ship carrying heavy cargo to take more time to come to a stop than an identical ship carrying lighter cargo if both ships are traveling at the same speed?  
 (A) increased friction (B) greater momentum (C) greater acceleration (D) more constant velocity
[A]: B


[Q]: Which of these is MOST likely the hardest to bend?  
 (A) Rubber band (B) Cloth ribbon (C) Leather shoe (D) Wooden board
[A]:
D