Which Statement Is the Best Description of a Saliency Map

Which statement is the best description of a saliency map?

A) The most noticeable parts of a visual scene are always determined based on the brightness in that particular field of view.
B) All parts of a visual scene are analyzed at compared for their features such as color, intensity, and orientation. These stimuli are compared and the noticeable features are where the attention is drawn using a competitive algorithm.
C) All parts of a visual scene are analyzed at compared for their features such as color, intensity, and orientation. These stimuli are compared and the noticeable features are where the attention is drawn using a non-competitive algorithm.
D) Saliency maps are constructed based on the frequency a visual stimuli is perceived. Saliency maps get more detailed as stimuli are repeatedly observed.