They're all correct, and they'd all also be quite natural in speech. The last one is a bit wordy, but there could be circumstances where someone might ask it that way. Just remember that when you don't invert the word order by putting the verb before the subject, you need to use a rising inflection to make sure that your listener realizes that you're asking a question.

In the USA, both sets of sentences can be correct and natural, but they convey slightly different nuances. Here's a breakdown: 1. **"Is that you making all that noise?"** - This is natural and direct. It sounds like you're asking if the person is currently the one making the noise. 2. **"That was you making all that noise last night?"** - This is also natural. It's a bit more casual and could be used when you're confirming something you just found out or realized. 3. **"Is that you who's making all that noise?"** - This is correct, but it's slightly more formal or emphatic because of the "who's." It's less commonly used in everyday conversation but still sounds natural. 4. **"That was you who was making all that noise last night?"** - This is correct and natural but more formal. It emphasizes that the person is the one responsible for the noise. **Summary**: - For a casual, everyday conversation, "Is that you making all that noise?" and "That was you making all that noise last night?" are the most common and natural. - The versions with "who's" or "who was" are grammatically correct but might be used in slightly more formal or emphatic contexts. You can choose any of these depending on the tone you want to convey.

All of these options are correct and sound natural in the U.S., but here's a slight preference based on common usage: 1. "Is that you making all that noise?" – Most common and natural. 2. "That was you making all that noise last night?" – Also natural and conversational. The versions with "who's" and "who was" are correct but sound a bit more formal: 3. "Is that you who's making all that noise?" – Correct but less common in casual conversation. 4. "That was you who was making all that noise last night?" – Correct, slightly more formal.

They are both natural and correct, as Jonathan says, but there are slight differences: #1 would be more common to say to a friend, or someone you know. The feeling is that you're surprised about the noise, not who was making it. "It sure was noisy - that was you?" #2 sounds a bit more like your are surprised WHO was making the noise, more than that it was noisy. "Were YOU the noisy one last night?" Very subtle difference, but hope that helps!

I would go for the first ones, but I'm not American