Answer:
B. four-crop rotations
Explanation:
the four-crop rotations was invented in the 18th century which means from January 1, 1701 to December 31, 1800. (1700s).
I believe its because of the axis of the earth.
I believe the answer is a.
Answer: Contemporaneous notes
Explanation:
The contemporaneous notes are the part of standard procedure for crime scene investigation. This involves the record of the place, form and type of evidence obtained from the scene of crime. The notes will help in reconstruction of events that might occurred at the scene of crime.