GWD21-10

10. GWD21-Q10:

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 stunning evidence that human ancestors

C.      appears was 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

我想请问stunning evidence到底是修饰谁的呢，从语法上讲作为同位语应该修饰an ancient lakeshore hunting ground, 但是从语义上说似乎修饰spears更好一些，麻烦大家给解答一下哈

stunning evidence that human ancestors名词evidence+同位语从句，用来解释说明整个主句

好像叫做概括性同位结构。