They have a wall that lights up and changes color . It runs down the length of the restaurant and can really change the atmosphere . Before passing out in bed last night I took some Mucinex D for my cold / allergy symptoms . It helped a lot !

Question: What most likely " helped a lot " ?
Answer: None of the above choices .The writer is referring to the Mucinex D helping their cold and allergy symptoms .Mucinex helps them to sleep or " pass out on the bed " as it states .The lights in the restaurant change the atmosphere .