Which tools did early communities first use to help them grow enough food to feed their residents and have a surplus at times?

A)tractors, combines, and GPS locators
B)polished stone tools, pottery, and canoes
C)wooden plows, pesticides, and flails
D)sickles, moldboard plows, and threshers

Write the quartstogallons java class that declares a named constant to hold the number of quarts in a gallon (4). also declare a variable to represent the number of quarts needed for a painting job, and assign an appropriate value—for example, 18. compute and display the number of gallons and quarts needed for the job. display explanatory text with the values, for example:

The average cost of one year at a private college in 2012-2013 is $43,289. the average grant aid received by a student at a private college in 2012-2013 is $15,680.   what is the average student contribution for one year at a private college in 2012-2013?

Which of the following is not a source of sustainable raw materials? a) coal mine b) flick of sheep c) cotton plantation d) line forest.