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]: After a heavy rain, a mudslide flows into a pond and mud mixes into the water. Which of the following is most likely to happen?  
 (A) Fish will have more food. (B) Trees will be able to get more light. (C) Raccoons will not be able to find food. (D) Underwater plants will receive less light.
[A]: D


[Q]: A student plants rosebushes in her front yard. The student is frequently seen pulling weeds from the base of the rosebushes. What is the most likely reason that the weeds are pulled?  
 (A) Weeds add fertilizer to the soil. (B) Weeds use nutrients the roses need to grow. (C) Weeds increase the bacteria in the soil. (D) Weeds consume most of the oxygen.
[A]: B


[Q]: A meteor in the atmosphere of Earth travels at 35 km/sec. It is slowed by friction with the atmosphere by 0.02 km/sec before it reaches the surface of Earth. What is the final the speed of the meteor caused by friction of the atmosphere?  
 (A) 0.7 km/sec (B) 34.98 km/sec (C) 35.02 km/sec (D) 1750 km/sec
[A]:
B