Yes, it could. This is a weakness of this sort of exercise as it's often possible to think of contexts where more than one answer is correct. The person writing the exercise has an idea of what they're testing, but doesn't think of all the possibilities- I have done it myself many times. This one could be fixed by saying I've just been introduced to Mario, but even then someone might say that it is possible for someone who doesn't know you are friends with Mario and introduced you. And so on.
- For Teachers