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 was invented by Benjamin Franklin?  
 (A) bifocal lens (B) telescope lens (C) telephone (D) camera
answer:
A


question:
Which action involving a pulley system requires the least amount of force?  
 (A) using several pulleys together instead of a single pulley (B) using a fixed pulley instead of a moveable pulley (C) pulling a long rope instead of a short rope (D) pulling a rope up instead of down
answer:
A


question:
Which pathway do most nutrients take after a person takes a bite of food?  
 (A) digestive system -> circulatory system -> body cells (B) circulatory system -> body cells -> digestive system (C) digestive system -> body cells -> circulatory system (D) circulatory system -> digestive system -> body cells
answer:

A