In western europe and north america, scientists began to understand the causes of infectious diseases at about what point in history?

The correct answer is a) 1850.

In Western Europe and North America, scientists began to understand the causes of infectious diseases at about 1850.

Scientist in Europe or The United States could better understand the nature of some diseases with the help of better technology and instruments. They started to understand that infectious diseases were disorders caused by organisms. These microorganisms were viruses, bacteria, parasites, and fungi. They understood that these diseases were contagious and could be transmitted by humans, animals, and insects. They also understood the human body reaction to these diseases and the medicine to cure them. For instance, in the mid-1850s, they discovered that Vibrio Cholera was transmitted by contaminated water. The bacteria embeds in the intestinal tract.

The other options of the question were B) 1650, C) 1950, and D) 1750.

the california missions began in the late 18th century as an effort to convert native americans to catholicism and expand european territory. there were 21 missions in all, lasting from 1769 until about 1833.   the missions were built by the spanish starting in 1769 in order to “colonize” the territory of alta california. so the missions were important because they were the means of settling california. it also wanted to keep other european countries out of alta california. building settlements along the coast would them meet these goals. missionaries wanted to convert the indians to the roman catholic faith. california indians did much of the work to build missions.

i think option 3. would be ur best bet and u need to write it urself

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