In act 3, what does walter mean when he says he's "going to put on a show" for mr.lindner

D, Speaking is more informal than writing.

Explanation: When speaking, we use common, informal words that we wouldn't use when writing, such as "low-key," "high-key." or "omg." When writing, we always lean towards formal, especially when writing essays or papers. Overall, speaking is much more informal than writing because of the words we use when speaking versus writing.