Select the most appropriate meaning of the underlined idiom in the given sentence.

Unless you are above board in your dealings, you will not be able to win the trust of your clients.

honest and frank

The most appropriate meaning of the underlined idiom in the given sentence is >honest and frank.<

The idiom "above board" means honest and fair, without any deception or trickery. In the sentence, the author is saying that if you are not honest and fair in your dealings with your clients, they will not trust you.

The other options are not correct.

• Exceptionally talented: This does not mean honest and fair.
• Bold and reckless: This does not mean honest and fair.
• Smart and deceptive: This does not mean honest and fair.