Problem:OPTIONS:
- objects that have mass
- warm-blooded
- Earth orbiting the Sun
- jellyfish
- salmon only
- bass only
- bass and salmon
- chickens

You are presented with the quiz "What have a centralized nervous system with a brain?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "fish have a centralized nervous system with a brain" and "fish include bass and salmon". So, what's the best answer to the question?
****
A: bass and salmon

Problem:OPTIONS:
- respiration
- Gunshots
- tortoises
- digestion
- sports
- gravity
- vehicles
- abrasion

You are presented with the quiz "what may lead to aggressive behaviors?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "competition may lead to aggressive behaviors or displays of aggression" and "many sports are solely competition sports". So, what's the best answer to the question?
****
A: sports

Problem:OPTIONS:
- blastoids
- h2o
- most cephalopods
- sea urchins
- one celled organisms
- dinosaur bones
- humans
- nuclear power

You are presented with the quiz "what can radioactive dating determine the age of?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "radioactive dating is used to determine the age of fossils" and "dinosaur bones, like many other artifacts, are fossilized". So, what's the best answer to the question?
****
A: dinosaur bones

Problem:OPTIONS:
- moved
- Energy.
- dangerous
- cries
- sleeps
- energy
- reacts
- stops

You are presented with the quiz "if an object is kicked then it very readily what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if an object is kicked then force is exerted on that object" and "because air is free to move, it very readily reacts to forces exerted upon it". So, what's the best answer to the question?
****
A:
reacts