Which of the Statements Below Is True of Bottom-Up Attentional

Which of the statements below is true of bottom-up attentional selection?

A) Some intrinsic aspect of the stimulus itself, such as its perceptual saliency relative to other information, causes it to be attended.
B) Control of attention occurs because of an item's specific perceptual characteristics, such as brightness, color, or motion
C) It is driven by processing information at primary sensory cortices
D) All of the above.