Google has just released a new artificial intelligence (AI) surveillance tool. Google claims that the tool is identical to the human perceptual system. For example, even while doing a number of tracking tasks, the tool will notice if a target walks by your front door. That's great, but not identical to the human perceptual system. Why? 

A. when humans are occupied with tracking tasks they display inattentional blindness and will not notice the walk-by 

B. humans have trouble tracking one stream let alone multiple tasks 

C. humans would be using bottom-up processing, this AI uses top-down 

D. in humans, shadowing would kick in 

E. humans would be using top-down processing, this AI uses bottom-up