input with options: You are presented with the quiz "What can viruses be seen with?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses are so small that they can be seen only with an electron microscope" and "electron microscopes are needed to see viruses". So, what's the best answer to the question?
OPTIONS:
- eye
- A computer
- magnifying glass
- microscope
- the skin
- radiation
- Chemical energy
- glasses
output: microscope

input with options: You are presented with the quiz "Puberty leads to sexual changes that travel throughout the body in what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "endocrine hormones travel throughout the body in the blood" and "puberty leads to hormonal and sexual changes". So, what's the best answer to the question?
OPTIONS:
- blood
- A drug.
- hair
- sleep
- painful
- years
- eyes
- chest
output: blood

input with options: You are presented with the quiz "what fossils have to be found in a place to signify the place used to be covered by water?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past" and "barnacles are animals that live in the water". So, what's the best answer to the question?
OPTIONS:
- bullfrogs
- Sediment
- Sea urchins
- dinosaurs
- barnacles
- humans
- patch reefs
- natural gas
output: barnacles

input with options: You are presented with the quiz "what are antigens?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "antigens are molecules that the immune system recognizes as foreign to the body" and "antigens are proteins foreign to the body". So, what's the best answer to the question?
OPTIONS:
- animals
- negative
- positive
- complex
- proteins
- PDAs
- humans
- parasites
output:
proteins