Choose the exact meaning of the underlined phrase. His dealings are all above board.

Open is the exact meaning of the underlined phrase.
Simple - is an invalid answer since simple means 'easy to understand, do, or use; not tough or complicated,' which is not the correct meaning of the phrase 'above abroad.'
Decent - this is an incorrect answer since the definition of decent is "being of an acceptable quality; satisfactory," which is not the correct definition of the term "above abroad."
Open - is the correct answer since the definition of open is 'not closed or covered,' which is also the definition of the term 'above abroad,' and they can be used interchangeably because they have similar meanings.
Friendly is an invalid answer because the definition of friendly is "behaving in a kind and open manner or demonstrating kindness in a way that makes people pleased," which is not the correct definition of the phrase "above abroad."