add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation.\n\nmonica…

Brief Explanations:

The sentence presents two parallel options for sprucing up the bedroom. When listing two independent parallel phrases connected by "or" after a prepositional phrase (introduced by "by"), no comma or semicolon is needed here as the structure remains clear and concise without additional punctuation.

Answer:

Monica could spruce up her bedroom by purchasing a new headboard for her bed or making one using fabric stretched over plywood.