How it was the Four Crop Rotation System before the agricultural revolution?

What was the effect of peace in europe after 1815

Which sentence best describes the effect of the bill of rights

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.