A or d because there can't just be random commas
Bring it in make sure you get your hook out there example do you like cats well this essay is about if cats are better is mind than dogs *cough, not really , cough* make sure you use words like well, then, however. and your sure to get a pretty good transition. Also, make sure it runs smoothly.
Answer: Topic sentences have a dual purpose to communicate the purpose of the paragraph and relate the paragraph back to the thesis. Or if you talking about something exciting, topic sentences have a dual purpose to communicate the purpose of the paragraph and provide exciting details.
Explanation: Hope this helps:)