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.

[Q]: Which type of organism is the best at fixing nitrogen?  
 (A) bacteria (B) fungi (C) protists (D) animals
[A]: A


[Q]: Which of the following was invented by Benjamin Franklin?  
 (A) bifocal lens (B) telescope lens (C) telephone (D) camera
[A]: A


[Q]: Offshore oil platforms affect ocean habitats. An ocean environment is most likely damaged by an offshore oil platform because  
 (A) leaking oil from the oil platform might pollute the water (B) fishing from the oil platform might reduce the fish population (C) drilling in the ocean floor might reduce the water temperature (D) changing the ocean floor might increase the number of hurricanes
[A]:
A