[問題]GWD 0 (天山九)- Q39

[val]

The greatest system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway, which, over 2,500 miles long and extending from northern Ecuator Peru to Southern Chile.

A). (same)
B). Columbus was the Incan highway, over 2,500 miles in length, and extended
C). Columbus, the Incan highway, which was over 2,500 miles in length and extended
D). Columbus, the Incan highway, being over 2,500 miles in length, was extended
E). Columbus, the Incan highway was over 2,500 miles long, extending

解答給(E), 不懂(B) 為什麼不對
謝謝各位高手在先

[vivid]

同GWD6-Q41
你可以去精華區看看

[val]

Thanks for letting me know, Vivid.