The correct answer is A. discreet.
Adulatory remarks are flattering or complimentary. They are often used to praise someone or something. Discreet remarks are said or done in a way that is not obvious or attention-seeking. They are often used to avoid causing offense or embarrassment.
Insulting remarks are hurtful or offensive. They are often used to put someone down or make them feel bad about themselves. Appreciate remarks are grateful or thankful. They are often used to express gratitude for something that someone has done. Funny remarks are amusing or humorous. They are often used to make people laugh.
In the given sentence, “His adulatory remarks surprised us,” the word “adulatory” means “flattering or complimentary.” This suggests that the speaker’s remarks were unexpected and caused the listener to feel surprised and
possibly even flattered. The other options do not fit the context of the sentence as well as the word “discreet.”