With Regard to "Cooling Off" Rules, Which of the Following

With regard to "cooling off" rules, which of the following is correct?

A) requires door-to-door salespeople to give written notice to customers placing orders of $25 or more that they can cancel their purchase within three days
B) it came after years of complaints about high pressure tactics in business-to-business selling
C) it came after managers complained about business-to-business salespeople who gained entrance to their firms and then gave a sales pitch
D) all door-to-door salespeople post a $100,000 bond with city authorities before making sales call in the city