求助：TPO 20 第一篇阅读13题

mingxiaxiamingUID: 2738919

13.Transportation was becoming less of a problem of those who wished to move
west and for those who wished to move west and for those who had far surpluses to
send to market. (1)■Prior to 1815, western farmers who did not live on navigable
waterways were connected to them only by dirt roads and mountain trails.(2) ■
Livestock could be driven across the mountains, but the cost of transporting bulky
grains in this fashion was several times greater than their value in eastern markets.
(3)■ The first step toward an improvement of western transportation was the
construction of turnpikes. (4)■ These roads made possible a reduction in
transportation costs and thus agriculture along their routes.

Click on a square ( ■ )to insert the sentence in the passage.
In fact, goods could be shipped more cheaply across the much greater
distance of the Atlantic Ocean than they could from western New York to
coastal cities.

这道题总是在第一个和第三个选项中纠结，各位同学谁能解释一下到底答案选哪个?

idealibtUID: 2667256

选C。

Livestock could be driven across the mountains, but the cost  was several times greater than their value.
可以走山路，但是运输成本很高，甚至高于货物本身。

In fact, goods could be shipped more cheaply.
实际上，运输成本可以更便宜的。

前一句的cost was greater 和插入句的more cheaply对应衔接上了