By the mid-eighteenth century, this （） network push thirteen quarrelsome provinces toward developing a new, independent-minded, egalitarian culture more American than British.

By the mid-eighteenth century, this （） network push thirteen quarrelsome provinces toward developing a new, independent-minded, egalitarian culture more American than British.
A.authorized
B.rudimentary
C.appreciation
D.debuted
正确答案：rudimentary