Final answer:
The sentence that correctly writes the idea about cat cafés is 'Cat cafés are exactly what the name suggests: coffee shops that feature real, live cats.'
Step-by-step explanation:
The correct way to write sentence 11 from the options provided is B. Sentence B, "Cat cafés are exactly what the name suggests: coffee shops that feature real, live cats," is the most grammatically correct. It uses a colon to correctly introduce the explanation of what cat cafés are. Sentences A and C use commas incorrectly, making them less clear and potentially confusing. Sentence D makes an incorrect use of a full stop, leading to a sentence fragment.