The______system was an ideal bas

The______system was an ideal basis for the simple community life of the countryside and subsistence farming in England before the moder industrial age.
A. The Rio Grande River
B.“money bills
C. The Trans-Canada Highway
D.“open-field”
E. St. Patrick
F. Roundheads
G. The Hume Highway
H. Aotearoa
I. Aborigines
J. Nunavut
K. the Bill of Rights
L. the Ku Klux Klan
【正确答案】：D