Which is true of ultraviolet rays?
they your body produce vitamin d.
they are visible to the naked eye.
they provide the energy that makes your morning toast.
they carry information to televisions and radios.

A is true of UV rays.
B is true not of UV rays but rather of visible light.
C is true not of UV rays but rather of microwaves. (unless you actually toast your toast in a toaster like a normal person)
D is true not of UV rays but rather of radio waves.