OG13 C3 44题求大牛解

momo1014

Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing  the port of New York City with a direct water link to the heartland  of the North American continent.

(B)Seldom more than 40 feet wide or 12 feet deep, but running 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected 我觉得or这词是改变原意的，and才对,难道它没有原句错的严重，所以选它？我又怎么知道谁的错更严重？
（D） The Erie Canal was seldom more than 40 feet wide  12 or feet deep and it ran 363 miles across the rugged wilderness of upstate New York, which connected
OG解释说D的or错！它怎么没提B也是错的呢~然后说deep后要加逗号变成两句从句，请问高手为何一定要从句？

yogaegg

为什么我看到的OG 13电子版上B选项是and 不是or....................