Test Prep Question on Oxytocin

So I've been studying for my second attempt on the NCLEX-RN, and came across a practice question that I missed:

The nurse prepares oxytocin for the client. Which supplies will the nurse need to prepare the prescribed oxytocin solution?

This was a select all that apply question. However I missed it because the one item I missed was a "19gauge 1 1/2 filter needle."

Based on the question, how was I supposed to know that this was in an ampule? If I had known it came in an ampule, I would have obviously selected the filter needle. A quick google search brought up oxytocin in vials, not ampules, though apparently it comes in both.

Any advice on questions like this? More and more I'm realizing to read the questions very, very, very closely.