TASK DEFINITION: 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.
PROBLEM: Which statement best describes the development of a human embryo?  
 (A) A single cell becomes many cells. (B) Each cell has a different function. (C) Many cells combine to form one cell. (D) All the cells have the same function.

SOLUTION: A

PROBLEM: The first telescopes were invented hundreds of years ago. Which was discovered as a result of this invention?  
 (A) the moons of Jupiter (B) the bacteria that causes disease (C) the deep-sea trenches in the ocean (D) the parts of a plant that perform photosynthesis

SOLUTION: A

PROBLEM: A geologist found several types of seashell fossils in a rock layer. Which is the best conclusion about the rock layer?  
 (A) The rock was once buried under a swamp. (B) Water from a river washed across the rock. (C) The rock was once sediment at the bottom of an ocean. (D) Migrating animals dropped the seashell into the rock.

SOLUTION:
C