31. Which of the following is correct? (A) More than 500,000 nurses in the US decided to quit as a result of Covid-19-related stress. (B) The negative influence of the pandemic seems to be more serious for experienced nurses than less experienced nurses. (C) Many experienced nurses are likely to quit their job before 2027, which will likely contribute to a healthcare crisis in the US. (D) According to the survey published by the NCSBN, around 20% of the participants plan to leave the nursing industry or retire in the next five years.