OG12 SC 73，请教

christinaryt

73.    Combining enormous physical strength with higher intelligence, the Neanderthals appear as equipped for facing any obstacle the environment could out in their Path, but their relatively sudden disappearance during the Paleolithic era indicates that an inability to adapt to some environmental change led to their extinction.

(A)    appear as equipped for facing any obstacle the environment could put in their path,
(B)    appear to have been equipped to face any
obstacle the environment could put in their path,
(C)    appear as equipped to face any obstacle the
environment could put in their paths,
(D)    appeared as equipped to face any obstacle the
environment could put in their paths,
(E)    appeared to have been equipped for facing any obstacle the environment could put in their path,

正确答案为B，我能理解为何不选其他四项，但不理解正确答案为何要用appear，而不用appeared?
请指点，谢谢。

zhangws

OG的意思好像就是用have been这部分来强调过去事实 再一个为了保持时态一致吧
1）He appears to have been happy, but his sudden suicide indicates that he was not.
2) He appeared to be happy. But his sudden suicide indicates that he was not.

christinaryt

嗯，谢谢。
我理解but后的句子中disappearance indicates了×××，是强调现在事实，只是觉得but前的句子描述的并非现在事实，而是过去事实。
打个比方，下面哪个句子好一些？
He appeared to be happy, but his sudden suicide indicates that he was not.
He appears to be happy, but his sudden suicide indicates that he was not.
或许我对OG中D的解释没理解透？

zhangws

OG对D选项的解释中有