The pattersons bought their tv from a store with a thirty-day return policy, and the stevensons bought the same tv from a different store with a policy that "all sales are final!" based on what the text reports about cognitive dissonance, which family is more likely to be satisfied with their tv
The Stevensons because having the option to return could create a situation where The Pattersons have contradictory options. Contradictory options create discomfort according to cognitive dissonance.