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

What specific science discipline do most social engineering attacks rely on when they are being used?

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

35 points pls fast. in a citizens elect the president as head of government separately from the legislature. question 1 options: parliamentary democracy communist state presidential democracy autocratic state question 2 (1 point) this form of government has only a single political party. question 2 options: communist democratic autocratic parliamentary question 3 (1 point) this is a government controlled by one person with absolute power. question 3 options: communist democratic autocratic parliamentary question 4 (1 point) a government is a government system where all citizens that choose to vote have a say in their government. question 4 options: communist democratic autocratic theocracy question 5 (1 point) in a the people elect the legislature, and the legislature chooses the head of government. question 5 options: parliamentary democracy communist state presidential democracy autocratic state