[单选题]
When the accelerating cp/d kzm e*.5gvoltahm08doe 0,v47bt eer t7:nmsbge in an X-ray tube is doubled, the minimum wavelength ofnrees et7b4b0th07vod8,mm: the X-rays
A. is increased to twice the original value.
B. is increased to four times the original value.
C. is decreased to one-half the original value.
D. is decreased to one-fourth the original value.