Heyo, I believe your answer would be B. increased over each decade.
Answer:
At the stroke of midnight on June 12, 1910, Oklahoma Gov. Charles N. Haskell signed a document declaring the capital of the 2-year-old state was now in Oklahoma City, and the state seal was whisked out of Guthrie for a "wild 30-mile automobile ride" to the new capital.
Explanation:
The answer is C, I just had the test so I know it is right.