[单选题]
When the accelerating voltage in an X-rac4p0msj; uh j z7ik)tkc-esn9 x: z-4oy tube is doubled, ds. ) tiuts9k+the minimum wavelength of the X- dsk9i)u tts+.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.