The answer is A. European leaders were concerned about instilling good hygiene practices.
During World War II minority groups used to rally under the slogan, "Double V" These two V meant victory against fascism in Nazi Germany and Japanese Imperialismas well as in the United States in terms of equality for African Americans.

the spinning wheel to produce textiles, the water wheel used to power machinery and the steam engine were invented. These inventions aided in speeding up the production of manufactured items.
Between 1066 and 1071 CE, William the Conqueror (r. 1066-1087 CE) led the Norman conquest of England, which lasted five years. The Normans were here to stay thanks to hard-fought wars, castle construction, land redistribution, and scorched-earth tactics. The Norman elite replaced the Anglo-Saxon elite and took over the country's territories, and the Church was restructured as a result of the conquest.