General Motors Estimates That U

General Motors estimates that U.S. demand for its newest product will be: Qus = 30,000 - 0.5P. Export demand will be Qex = 25,000 - 0.5P. The total market demand curve for this product will be a

A) straight line with a slope of -0.5.
B) straight line with a slope of -1.0.
C) kinked line with the kink at Q = 25,000.
D) kinked line with the kink at P = 50,000.
E) none of the above