The earth is tilted at an angle of 23.5o with respect to the plane of its orbit around the sun. If the amount of tilt were increased to 40o, we would expect in middle latitudes __________?
A. Hotter summers and colder winters than at present
B. Cooler summers and milder winters than at present
C. Hotter summers and milder winters than at present
D. Cooler summers and colder winters than at present
E. No appreciable change from present conditions