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.

Which of the following was most likely the cause of the extinction of 60-100 species of native birds in Hawaii since the arrival of colonists?  
 (A) habitat destruction (B) volcanic eruptions (C) increased salinity (D) tidal waves
A

The main function of a fish's fins is to help the fish  
 (A) reproduce (B) see (C) breathe (D) move
D

Why are many telescopes used far from cities?  
 (A) The light from the cities makes it hard to see stars. (B) The noise from the cities vibrates the telescopes. (C) The power lines from the cities produce interference waves. (D) The pollution from the cities reflects starlight.

A