1: being on the post or right next to the goal keeper
2: pushing the hockey ball
3: keeping the ball close to the hockey stick
I would say the answer would be B.
Hope this helps!!
The problem you would most likely be looking for is the patient's becoming sick from exposure to a blood-born pathogen. Needle sharing is a very good way to pass on many nasty viruses; HIV is a big one. Normally you see a lot of this phenomenon with needle sharing for IVDA's of heroin (Intravenous Drug abuser)