The answer is D. There on the monitor screen was a big smiley face!.
Because an independent clause is a sentence that's able to be by itself and make sense,
This is the butchers shop where fresh meat is sold
The question is asking to complete the said passage in your question about the expression of emotions on the characters mind and base on the said passage, the answer among them is an interior monologue. I hope you are satisfied with my answer and feel free to ask for more
