Which of the following is NOT an open tissue injury?

To assess the "O" of the OPQRST mnemonic in a patient who is having chest pain, you should ask:

A) Are you having any other signs or symptoms? B) What were you doing when the pain began? C) How many times has this happened in the past? D) On a scale of 1 to 10, with 10 being the worst, how would you rate your pain?

Even if you question whether a call is actually an emergency, you must always ________.

A. assume the best-case scenario B. investigate until you know for sure C. assume that it is and alert the physician D. try to diagnose the condition