Viewing people as "social atoms" that obey rather simple rule (which are not unlike the laws of physics), one may discover certain (i)____________. Take, for example, the way channels emerge when people move in crowds. In the midst of initially (ii)____________ movements, one person begins to follow another – in an effort to avoid collisions – and streams of movement emerge. As more people join in, there is greater pull on others to join the flow, and the particular channels become (iii)____________. A. apparent contradictions B. inflexible C. self-defeating D. unproductive tendencies E. straightforward F. self-aggrandizing G. lawlike regulations H. chaotic I. self-perpetuating