Answer: (C) Was an English anesthesiologist who used natural experiments.
Explanation:
John snow was an English anesthesiologist and he accomplishment in the anesthesia, medicine and in the epidemiology.
Dr john snow set up the series for using the natural experiments. He is also known as the father of the modern epidemiology.
He basically believe that the sewage dump into the rivers near the town can cause the cholera outbreak. In 1854, he investigated the reason of out break and also proves his theory in the Soho, London. He also leader of the development of the medical hygiene and the anesthesia.
Yes you can, it wouldn't be easy but you could, talking would be pointless, saliva would have to be accommodated with some type of liquid but, Yes there have been several cases where people are born without tongues and live!
The three sides of the health triangle is Mental, Physical and Social
