The nurse was very busy and unfamiliar with a new medication, but administered it anyway. Later the ...

The nurse was very busy and unfamiliar with a new medication, but administered it anyway. Later the nurse looked up the medication. How does the nurse manager evaluate this behavior?
 
  1. This was acceptable as long as the nurse looked up the action and side effects of the drug later.
  2. An error could have occurred because the nurse was unfamiliar with the medication.
  3. The nurse manager was partially at fault because the nursing unit was understaffed and the nurse was too busy.
  4. An error did occur because the nurse could have administered the medication via the incorrect route.