Members of a Security Team Are Stationed on Rooftops Surrounding

Multiple Choice

Members of a security team are stationed on rooftops surrounding a large city plaza before a scheduled rally. Suddenly, three team members in different locations radio in to the command center, each stating that they have spotted a suspicious box on the ground with a pipe coming from the top. What enables the security team members to report seeing the same object despite being stationed on different rooftops?

A) Semantic regularity
B) Viewpoint invariance
C) Bottom-up processing
D) Principle of similarity