I don't think there's a right or wrong way here. Just do what feels right to you. Maybe that's trying to help multiple fundraisers, or maybe that's giving more to one and telling friends about the others. Whatever the case, I'm grateful for your desire to help!
Jack, I don't know where to begin. I feel like I should donate to all of them. Would a lot of small donations be helpful?
I don't think there's a right or wrong way here. Just do what feels right to you. Maybe that's trying to help multiple fundraisers, or maybe that's giving more to one and telling friends about the others. Whatever the case, I'm grateful for your desire to help!