A. It prepares to fight danger or run from it.
Yes, a PFO can be fixed using a non surgical procedure causing it to be closed and therefore fixing it.
It's very important and useful to consume multivitamins; although it's much better and healthier to simply eat vegetables and foods which then povide you with your daily recommended levels of all of them. Without vitamins and minerals, our body wouldn't function properly and it would probably shut down and we would slowly start to perish.
The answer in A) Phlebitis because the abbreviation -itis means inflammation and phleb/o means vein.