According to Consumer Protection Principles, When Should Your Business Provide

According to consumer protection principles, when should your business provide a refund for a completed online transaction?

A) when the transaction was the result of a keystroke error
B) when the customer had no opportunity to correct or cancel her order before it was accepted
C) when the customer has entered into the transaction without adequate information
D) when the customer mistakenly entered into the transaction because of inaccurate prompts on your web site
E) all of the above