You are given a science question (easy-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 statement explains why a mother's unhealthy diet during pregnancy is harmful to her embryo's development?  
 (A) The embryo inherits half its chromosomes from its mother. (B) The embryo receives its food from its mother through the placenta. (C) The embryo receives oxygen through the placenta. (D) The embryo receives mutations carried by its mother.

A: B
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Q: Overuse of soil for farming causes local disruptions of several Earth subsystems. Which of these is a part of the biogeochemical cycle that experiences the most severe local disruption?  
 (A) release of carbon into the atmosphere (B) release of oxygen into the atmosphere (C) cycling phosphorus into the soil (D) cycling hydrogen into the soil

A: C
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Q: Particle accelerators, such as the Large Hadron Collider in Europe, accelerate subatomic particles to great speeds. These particles move in opposite directions at nearly the speed of light and collide into one another to simulate conditions that were present as the universe formed. Which property of matter in the initial moments of the universe are these accelerators designed to simulate?  
 (A) low density (B) high energy (C) massive nuclei (D) circular movement

A:
B
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