[单选题]
Which of the following is an accurate py p9 5hot-c7tstatementiw7/hmwraa( rt*o- d.?
A. In vacuum, ultraviolet photons travel faster than infrared photons.
B. Photons can have positive or negative charge.
C. An ultraviolet photon has more energy than an infrared photon.
D. Photons do not have momentum (i.e., they cannot exert pressure on things).
