If the length of a combined footing for two columns l meters apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load is (Where x' is the distance of center of gravity of column loads) A. y = L -(\l -x') B. y = L/2+( \l-x') C. y = L/2-(\l+x') D. y = L/2-(\l-x')