Why were medieval manors nearly self-sufficient? Nobles allowed serfs to earn freedom as long as the manor ran smoothly.
The establishment of a middle class provided a stable economy and thus little direction was needed.
It was not necessary to hire anyone on the manor and most of the materials needed were on the premises.
Slaves were brought in to run the manor efficiently.

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users