In a Moseley graph:
A. the x-ray frequency is plotted as a function of atomic number
B. the square of the x-ray frequency is plotted as a function of atomic number
C. the square root of the x-ray frequency is plotted as a function of atomic number
D. the x-ray frequency is plotted as a function of the square root of atomic number
E. the square root of the x-ray frequency is plotted as a function of atomic mass