How can an experiment that disproves a hypothesis be useful

An experiment that disproves a hypothesis can be useful because even though it is wrong it might lead you to more questions or ideas for new experiments or even an idea of what a better hypothesis might be or a better way to do the experiment. This is a terrible run on sentence but my point is that  just because something is wrong doesn't mean it can't give you information. Its like how a a graph with no trend would still be useful even if it doesn't support what you thought. Hundreds of thousands, maybe even millions of scientists have made mistakes but most of the time their wrong hypothesis has shown them more than a right hypothesis would have and sometimes even leads you to something bigger and better then what you were even trying to find in the first place. Sorry this was so long its just that i just recently had to write a paper on this and so i have a lot of ideas. Hope this helped! :)

The answer is 4 i don't know if its right let me see.