Select all that apply. what three things provided agricultural breakthroughs in europe during this age? new kinds of seeds the plowshare and moldboard warmer climate three-crop field rotation system thousands of acres cleared of trees

The three things are:
- plowshare and moldboard  (which is used to prepare the grass and soil)
-  three-crop field rotation system (using same space to grow different crops in different time period)
- Warmer period (provide optimal environment for the crops to grow in the area)