instruction:
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.
question:
One hot summer, a grassland experienced a drought. Which most likely happened in the ecosystem during this time?  
 (A) The competition for food among primary consumers increased. (B) Nutrients cycled through the system at a faster rate. (C) Less solar radiation was able to enter the system. (D) Secondary consumers became extinct.
answer:
A


question:
Martin is writing a report for science class about how the tilt of Earth affects living organisms. Which subject should Martin include in his report that is directly affected by Earth's tilt?  
 (A) night and day (B) cloud formation (C) phases of the Moon (D) changing of the seasons
answer:
D


question:
A plant sitting on a windowsill has wilted. A student explained that the plant wilted because it is in direct sunlight. What is another possible reason the plant wilted?  
 (A) The noise in the room was too loud. (B) There was too much space for the plant to grow. (C) The plant did not receive enough water. (D) There was too much carbon dioxide in the room.
answer:

C