Why most questions have only one answer?

I agreed with you. Many times they don't have anything to say and they asnwer the question sore as uhmmmmmmmmmm or ha ha ha, they don't want to think. They just want the 2 points. I tried to answer the question not to get points, but I want to learn and help someone. I don't think myself as a stuped answer. When I answer a question, I can only do the best I can. Compare all the answer to see if they match, if they do, you have an idea who is right. Also I notice some people want to answer a question using a vocabulary or they are so sophisticate that you don't even understand. Also they criticize you English and call you stuped. For people like that I put a thumb down.