A-A+
Freight costs were reduced to 10% of what they
问题详情
Freight costs were reduced to 10% of what they had been because of
A．the decline in taxes.
B．the construction of the railroads.
C．the construction of the Erie Canal.
D．the development of industry.
参考答案
正确答案：C
解析：第六段第一句话：The canal produced an immediate effect．Freight costs were cut to about one-tenth of what they had been。故应选C。
