Some scholars argue that a large population makes ______ would otherwise be unprofitable,especially railroads,highways,irrigation systems and pots.A.it profitable that many social investments B.profitable that many social investments C.many profitable social investments that D.profitable many social investments that帮我划分下句子结构..
问题描述：
Some scholars argue that a large population makes ______ would otherwise be unprofitable,especially railroads,highways,irrigation systems and pots.
A.it profitable that many social investments
B.profitable that many social investments
C.many profitable social investments that
D.profitable many social investments that
帮我划分下句子结构..
答