Ok...well they had no issues scanning mine in. I took the originals to my interview but he didn't need to see them. He told me everything was fine. But yes, better safe than sorry- don't use highlighters.
I did the flashcards, too....and the test was as easy as can be- really! If you do those for 10 minutes a day, you'll be fine! Good luck!😃you're almost done👍😃