Why Is White Noise the Best Choice for Masking Random

Why is white noise the best choice for masking random sounds in an environment?

A) White noise consists mostly of low frequencies, which are the best at masking random sounds since they also tend to be mostly low frequencies.
B) White noise consists mostly of medium frequencies, which are the best at masking random sounds since they also tend to be mostly medium frequencies.
C) White noise consists mostly of high frequencies, which are the best at masking random sounds since they also tend to be mostly high frequencies.
D) Since white noise includes energy at all frequencies, it is good at masking random sounds of any frequency.
E) The structured and cyclical nature of white noise provides a clear pattern that interferes with the perception of random sounds in the environment.