An insurance agent sold an equity$-$indexed annuity to a client before she had attended her company's training session because the client "couldn't wait" to buy one and the agent didn't want to miss the sale. The agent figured these annuities were probably similar to variable annuities, and she had sold lots of those in the past. To cover herself, the agent gave the client all the paperwork and compliance materials required by her insurance company. Which one of these ethical duties did the agent violate?