PP2-61和101 解釋有矛盾嗎？

這裡還是不透～

61. Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who systematically hunted big game much earlier than believed.

(A) it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors who

(B) it appears had been an ancient lakeshore hunting ground and is stunning evidence that human ancestors

(C) it appears to have been an ancient lakeshore hunting ground and is stunning evidence that human ancestors

(D) appears to be an ancient lakeshore hunting ground, stunning evidence that human ancestors

(E) appears that it is an ancient lakeshore hunting ground, stunning evidence of human ancestors who

答案是（D）    筆記上(A)(B)的解釋是what it appears was 和what  it appears had been 這樣寫會有兩個主詞和動詞

那PP2-101題不就矛盾了嗎？

101. The electronics company has unveiled what it claims
    is the world's smallest network digital camcorder, which is as long as a handheld computer and weighs less than 11 ounces.

不知道是不是因為101題what的前面是unveiled，所以後面才以what為主詞it claims 修飾what形成一個完整的子句

拜託~幫幫忙吧!

我也被这类题折磨者哪，试着解释一下，如果从意思上理解：

61题 what 与it 都指同一事物，作from的宾语，所以重复

101题 it 指代the electronics company, what 指代claim的内容，所以不能说it和what重复

不知这样理解是否正确，请NN们指教

謝謝可愛的wo11111111  !!!

還有NN可以多解釋一下下嗎???