Which of the following is correct about the precautions in the course of HP eradication treatment

A、Time of administration: PPI and bismuth are generally taken half an hour before meal, and antibiotics are taken half an hour after meal;
B、The eradication time of Helicobacter pylori was 14 days;
C、It is suggested that urea breath test should be carried out at least 4 weeks after the eradication treatment to determine whether Helicobacter pylori is eradicated;
D、All of the above are correct