Line \(L\) in the \(xy\)-plane contains points \(A\) and \(B\) with coordinates \((-4,5)\) and \((6,-1),\) respectively. Line \(k\) is perpendicular to \(L\) and contains the midpoint of line segment \(AB.\)

Which of the following statements is true?

I. The slope of line \(L\) is \(-3/5.\)
II. Line \(k\) has a negative slope.
III. Line \(k\) contains the point \((1,2).\)

A. I only
B. II only
C. III only
D. I and III only
E. I, II and III

The OA is D