题目解析:
第4段高亮句主干:(1)Entirely functional, the Roman aqueduct conveys the balance, proportion, and rhythmic harmony of a great work of art and (2)fits naturally into the landscape.
A选项Because的因果逻辑及more naturally into的比较关系文中未提及,错误;
B选项体现了主干信息的functional and artistic对应(1),blend naturally with the landscape对应(2),正确;
C选项rather than的否定表达文中未提及,错误;
D选项is often inspired by the landscape文中未提及,错误。
故选B。