请教新东方小蓝上的197题

Archaeologists have found wheeled ceramic toys made by the Toltec ,twelfth-century inhabitants of what is now Verruz.Although there is no archaeological evidence that wheeled utility vehicles were used to carry materials needed for thhe monumental structures the Toltec produced.

which of the following ,if true ,would most help the anthropologists explain the lack of evidence noted above?

B.any wheeled utilitu vehicles used bu the Toltec could have been made entirely of wood ,and unlike ceramic,wood decays rapidly in the humid climate of Veracruz.

E.some of the wheeled ceramic toys were found near the remains of monumental structures

答案选B，可我实在想不明白为什么，恳请大牛指点

题干说考古学家发现了带轮子的陶制玩具，尽管没有考古证据表明 带轮的公用车辆被使用在纪念性建筑物上。

问题是问哪项  帮助考古学家解释  缺少带轮子的公用车辆被使用在纪念性建筑物上 的证据

B 是说任何带轮的公用车辆都是完全用木头制成的，和陶瓷不一样，木头在V的湿润的气候中腐烂的很快。

解释： B 是说木头不能被留存，不能作为证据，所以这恰好 解释了 考古学家缺乏证据，所以选B

关于E ,一些陶制玩具在纪念物旁边被发现的。 如果说有关，那就是说明在纪念物旁是更好的证据，本题是要找缺乏证据