Which word does the underlined clause modify?
many ancient egyptian tombs, *which were discovered centuries before*, had been robbed of their treasures.
a.
tombs
b.
ancient
c.
robbed
d.
egyptian

Which word does the underlined clause modify?Many ancient Egyptian tombs, *which were discovered centuries before*, had been robbed of their treasures.

A.
tombs

B.
ancient

C.
robbed

D.
Egyptian

What were discovered centuries before?
Tombs, as it states in the passage. 

Identify the theme of the story in your sentence