Mark Just Bought a Brand-New Subaru Hybrid After Driving a Twenty-Year-Old

Multiple Choice

Mark just bought a brand-new Subaru hybrid after driving a twenty-year-old car for a long time. He is really impressed with his new car and takes every opportunity to drive his friends around in it. Over the next year, three of his friends buy new Subarus and three others are seriously considering doing so. Which concept best describes what is happening in Mark's network?

A) high centrality
B) contagion
C) tie strength
D) anomie