Read the passage about dr. john snow. in 1849, doctor john snow began to question the long-held beliefs that disease was caused by “bad air.” when a cholera epidemic broke out in london, he interviewed residents of the hardest-hit areas. he mapped cases of the disease and determined that they were centered around a particular water pump. to test his theory that contaminated water was to blame, he convinced local leaders to disable the pump by removing the pump’s handle. the outbreak came to an end. what was dr. snow’s hypothesis? cholera was caused by “bad air.” cases were centered around a water pump. contaminated water caused cholera. leaders should disable the water pump.

C. Contaminated water caused Cholera.

no

explanation:

not everyone in america is free. it is has always been a unequal society. and yet people come in swarms, in search of better lives. some are brought as children, unaware, unknowing. some arrive and just don’t leave. they build lives, pay taxes, raise families. some enter illegally, fleeing persecution in their home country.

there are many reasons why human beings are so attracted to america, despite its history of bitterness towards immigrants.

there are almost two million immigrants brought to the us when they were children. president donald trump and his collaborators are determined to rid the us of as many undocumented immigrants as they can, and stop others from coming because none of their ancestors were immigrants.

america has so many things and yet it lacks the one thing that humanity needs to fully thrive. and so this country will not be at peace in itself until it resolves the pain at the heart of slavery, attacking immigrants, and crumble the rights of those with less power.

answer

wages and job opportunities have grown slowly since the recovery began five years ago, while technology continues to change the nature of work. while many workers enjoy opportunities unimaginable a generation ago, many others feel the economy has left them b

explanation: