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:
Which of the following compounds is most likely to be part of living organisms?  
 (A) C?H??O? (B) BF? (C) MoCl? (D) CsI
answer:
A


question:
Which process in the water cycle returns water from the surface of Earth to the atmosphere?  
 (A) condensation (B) evaporation (C) precipitation (D) runoff
answer:
B


question:
In the 20th century, Edwin Hubble deduced from observations that there are galaxies other than the Milky Way. Hubble's observations depended on improvements in a technology first developed by which scientist?  
 (A) Democritus (B) Isaac Newton (C) Galileo Galilei (D) Anton Van Leeuwenhoek
answer:

C