Why might taking the right turn be dangerous here?

In this situation, the road is icy or snowy, which increases the risk of skidding. Vehicles coming out of the side street may also skid because of the slippery surface, which is why answer 1 is correct. Additionally, your own vehicle might start to skid if you take the turn too fast on this icy road, making answer 2 important. Finally, because of the slippery conditions and the possibility of pedestrians crossing the side street, you might not be able to stop quickly enough in an emergency, which supports answer 3.

In summary, on icy or snowy roads, turning requires extra caution: both other vehicles and your own vehicle are at risk of skidding, and stopping distances are longer, especially if pedestrians might be present. This is why all three reasons apply in this scenario.