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.

Spring tides occur during which lunar phases?
(A) first quarter and last quarter (B) full moon and new moon (C) when the moon is waxing (D) when the moon is waning
B

Helen is preparing a presentation about objects in the solar system. She includes facts about the order of the planets and their distances from the Sun. Which statement could she include in an accurate presentation?
(A) Mars is closer to the Sun than Earth. (B) Neptune is one light-year from the Sun. (C) Jupiter is farther from the Sun than Uranus. (D) Earth is one astronomical unit from the Sun.
D

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.
A