Back Home Again in Newton County Mystery Cache

The cache is not at the posted coordinates. To find the coordinates, you must first answer this trivia question:

Newton County, Indiana was named after which of the following people?

A.) Isaac Newton
          N 39 26.838
          W 87 11.761

B.) Olivia Newton John
          N 39 27.111
          W 87 12.008

C.) Robert Newton
          N 39 27.782
          W 87 11.745

D.) Sgt. John Newton
          N 39 27.746
          W 87 11.832