You ordered magnets to help market your business. You just got an example to check over and verify that everything looks as you expected. What stage of printing are you particpating in? Post-Press Press Bench-Press Pre-Press
I am pretty sure it is Pre-Press. Since you are checking over and verifying that everything looks as you expected, you are making sure everything looks right BEFORE publishing whatever it is you are publishing thus I think the answer is D. Pre-Press