Here is the story for the last question i asked and the last one will be- in another question :p sorry

Which of the following is one of the innovations that neolithic farmers become more productive? a) plow b) windmill c) tractor d) reaper

What is it called when countries build lots of weapons to store and them in case of a war?

Humphreys collecting data for the tearoom trade study under the pretense that he was a lookout is an example of a violation of the principle of: a. justice. b. beneficence. c. respect for persons.