Which of the following identifies a scientific discovery that reduced the rate of deaths from combat wounds in World War 11? radar
penicillin
nuclear fission
mustard gas

Cities were dirty, noisy, and overcrowded. London had about 600,000 people around 1700 and almost a million residents in 1800. The rich, only a tiny minority of the population, lived luxuriously in lavish, elegant mansions and country houses, which they furnished with comfortable, upholstered furniture

By the end of the 1800s, all of this was starting to change. Many more people lived in cities and worked in factories or in offices. Many people had gas lights or electric lights. People took trains to get places.

Explanation: