Energy Auditors Were More Successful in Persuading Home Owners to Make

Energy auditors were more successful in persuading home owners to make improvements that would increase the energy efficiency of their homes when:

A) the auditors were expert and trustworthy
B) the auditors showed home owners' reports of how much money they would save if they made the improvements
C) the auditors used highly vivid language and examples when making their recommendations to home owners
D) the auditors used a two-sided argument when making their recommendations