A nurse is reinforcing teaching of a newly licensed nurse about hyperemesis gravidarum. Which of the following statements by the newly licensed nurse indicates the reinforced teaching was effective?

"A decrease in saliva production may aggravate the disorder."

"Decreasing gastric secretions lead to increased nausea."

"An increase in human chorionic gonadotropin (hCG) levels may contribute to this disorder."

"Symptoms begin and are most severe during the second trimester of pregnancy."