A​ 21-year-old female patient has called EMS for severe​ right-sided abdominal pain. Which of these questions should be asked before the​ others?
a) ​"When was your last normal​ period?"
b) ​"Does the pain radiate into your​ back?"
c) ​"Have you had any vaginal bleeding in the​ past?"
d) ​"Have you had a kidney stone​ before?"