In Neisser and Becklen's Experiment with Superimposed Video Scenarios,what Is

In Neisser and Becklen's experiment with superimposed video scenarios,what is a likely explanation of the outcome?

A) Subjects must be able to use both content and physical cues to guide their eyes to the critical detail.
B) Subjects must depend largely on content and context to be able to monitor one scenario in preference to the other.
C) Subjects must depend largely on physical traits of the stimuli to be able to monitor one scenario in preference to the other.
D) Subjects must use a complex segmentation and cognitive resynthesis to monitor one scenario while filtering out the other.