这题好乱啊 看不懂啊 有没有！！！

lllmmm

Archaeologists in Michigan have excavated a Native American camp near Dumaw Creek.  Radiocarbon dating of animal bones found at the site indicates that the camp dates from some time between 1605 and 1755.  However, the camp probably dates to no later than 1630, since no European trade goods were found at the site, and European traders were active in the region from the 1620's onward.

Which of the following, if true, most strengthens the argument?

(A) Due to trade among Native Americans, some European trade goods would have reached the area before the European traders themselves did.
(B) At all camps in the region that have been reliably dated to the late 1620's, remains of European trade goods have been found.
(C) The first European trade goods to reach the area would have been considered especially valuable and preserved as much as possible from loss or destruction.
(D) The first European traders in the area followed soon after the first European explorers.
(E) The site is that of a temporary camp that would have been used seasonally for a few years and then abandoned.
答案是B   我根本看不懂 按照相关无关选了A   求哪位高手来解答一下！

eeyore0827

原文说因为1620s以后有欧洲贸易，而这个camp没发现货物，所以推论这个是在那之前。
A说的是一些欧洲的货物在贸易开始前就被运来了。那这里更加应该能发现货物了啊。。
B说其他晚于1620s的camp都发现了这种货物，那么这个camp没有，就说明是早于1620s的