You just took a radiograph, but do not like the contrast. For a short scale, how can you increase contrast and maintain original density?

A. Decrease the original kVp by 15 kVp; Use 2 times the original exposure time.
B. Increase the original kVp by 15 kVp; Use one-half the original exposure time.
C. Increase the original kVp by 15 kVp; Use 2 times the original exposure time.
D. Decrease the original kVp by 15 kVp; Use one-half the original exposure time.