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: Emily made a cup of tea and stirred it with a spoon. The spoon became warm. How was the heat from the tea transferred to the spoon?  
 (A) convection (B) radiation (C) conduction (D) evaporation

A: C
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Q: Which of these best describes a change that is physical?  
 (A) yarn being knitted into a sweater (B) the engine from a tractor being started (C) the metal on a bicycle forming rust (D) grass capturing the energy from sunlight

A: A
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Q: A scientist investigated how well plants native to Maryland would grow in desert conditions. The scientist placed equal amounts of desert soil into 10 identical containers. Each container held two of the same kind of plant. The scientist investigated a total of 10 different kinds of plants. The scientist placed all of the containers into a greenhouse adjusted to produce hot, desert-like conditions .The scientist gave the plants equal, but small amounts of water for the next five weeks. Most of the plants did not survive after the five week investigation. Which statement best explains why 16 of the plants did not survive?  
 (A) Plants do not grow in desert conditions. (B) Few plants survive severe changes to their environment. (C) Plants native to Maryland are not good for scientific studies. (D) Plants native to Maryland are only able to survive in Maryland.

A:
B
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