What Was Jethro Tull's Contribution to English Agriculture in the Eighteenth

What was Jethro Tull's contribution to English agriculture in the eighteenth century?

A) He demonstrated that slow oxen that produced more manure were preferred for plowing than swifter-moving horses.
B) He critiqued accepted farming methods and developed better methods through empirical research.
C) He caused a rural rebellion and ultimately the demise of the enclosure movement after burning his fields rather than enclosing them.
D) He paved the way for peasants to own land-after he became the first non-noblemen to be England's largest landowner.