Which of the following is true of a single-slit diffraction pattern?
(A) It has equally spaced fringes of equal intensity.
(B) It has a relatively strong central maximum.
(C) It can be produced only if the slit width is less than one wavelength.
(D) It can be produced only if the slit width is exactly one wavelength.
(E) It can be produced only if the slit width is an integral number of wavelengths.
