The Diary of Anne Frank tells the true story of a young girl and her family that were hidden during the Nazi occupation of the Netherlands by a gentile Dutch couple, though they were eventually discovered.
A. that were hidden during the Nazi occupation of the Netherlands by a gentile Dutch couple, though they were eventually discovered
B. that were hidden by a gentile Dutch couple during the Nazi occupation of the Netherlands, though they were eventually discovered
C. whom a gentile Dutch couple hid during the Nazi occupation of the Netherlands but were eventually discovered
D. who were hidden by a gentile Dutch couple during the Nazi occupation of the Netherlands but were eventually discovered
E. who were hidden by a gentile Dutch couple during the Nazi
occupation of the Netherlands even though they were eventually discovered.
Source: ManhattanGMAT SC Test
OA given is D. I agree with OA but my doubt is about the "but" in option D.'
I read in most of the questions that the "conjunctions are used to connect two independent clauses." "But" is one of the conjunction. So, in option D "but were eventually discovered" is not an independent clause and so doesn't seem to follow the rule. So, please explain why the usage of "but" in this case is valid.
Thanks!
GeeMate.