TOEFL Reading: ETS-TOEFL阅读机经 - H85H13P35UF89SKGL$

Why does the author mention that "English land owners brought more dense marshes and woodlands into cultivation?" A. To give an example of a way in which the English increased agricultural production B. To emphasize the influence of English agriculture on the agriculture of other European countries C. To emphasize that Spanish agriculture needed to improve their farming methods D. To discuss an intended consequence of crop specialization