The Oregon Trail went through the South Pass……..in 1842.
(A) where was Gold discovered
(B) it was where Gold discovered
(C) discovered where Gold was
(D) where Gold was discovered
This is a question on correct word-order. Obviously the choice (D) makes the sentence a meaningful one as follows:
The Oregon Trail went through the South Pass where Gold was discovered in 1842.
So, we can choose choice (D) as the answer.
TOEFL : Model Questions Index