When considering opportunity cost do you have to make a blank and deal with the blank

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

Imagine you are driving down the highway and reading a sign that states save the planet don't litter which technique of policy enactment is being used

36) the mississippians were considered to be horticulturalists, which means they were a) native americans. b) hostile to non-mississippians. c) people who relied on hunting and gathering. d) people who grew plants, fruits, and vegetables. 37) wine rice indigo silk this list represents the major crops grown in colonial georgia. what crop should correctly be placed in the blank space? a) potatoes b) poultry c) tobacco d) tomatoes