I believe it is option D Sympathetic Nervous System.
A is the answer. This is because this was not covered by the Twin studies.
Good luck!
-RxL
True, lots of things are enjoyable once you like to do the activity
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Answer:
A vaccine basically works by injecting a small amount of a virus into your body, and your body learns to fight the virus and becomes immune to the virus.
Explanation If it is 100% safe and effective, I will take the vaccine. The vaccine is stored at 2-8 degrees celcius. It can stay in the refrigerator for 72 countinuous hours. 172 countries are working on a vaccine. 5 are the US, China, Brazil, Italy, and Japan. The name of the vaccine is COVAX. Two doses are required, and it should be mandatory for high risk people as well as everyone else.
The answer is B, because carbon monoxide is a poisonous gas, it has no smell or taste and continuous inhalation may choke you to death.
