John Snow, in Snow on Cholera Group of answer choices A. Was the father of modern biostatistics Established postulates for transmission of infectious disease B. Was an English anesthesiologist who used natural experiments C. Argued that the environment was associated with diseases such as malaria D. Was a London surgeon who identified an environmental cause of cancer

b. Was an English anesthesiologist who used natural experiments

Explanation:

John Snow, in Snow on Cholera, Was an English anesthesiologist who used natural experiments.

this question is confusing, could you reword it?

explanation:

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.