A. Because if you made a summary about the passage, you would not include that minor detail so B is incorrect. Drug abuse/addiction is the main idea, so c is incorrect. In conclusion, A is correct
Answer: Adam Smith would have disagreed with this statement. He believed government should not regulate the economy or control trade.
Explanation:
Even though Adam Smith believed that the government had a role to play in the economy, he believed that this role should be limited to National defense, upholding civil law and providing public services like education.
He would therefore be against the government regulating trade agreements that allow the passage of goods and services into and out of the country. Karl Marx and John Maynard Keynes on the other hand, advocated for government intervention, albeit in varying quantities.
To improve a conclusion, a writer must bare in mind that it should not address a new topic, that is to say, it has to be a recompilation of the topics already mentioned and developed in the paragraphs, so it has to be a kind of "summary", an overall of the topics and ideas discussed. It should be concise and the reader needs to be know it is the conclusion and you are not going to keep on working on the ideas, so sometimes, it is necessary to include the words "to conclude"/ "to round up"/ "in conclusion" or something similar on order to let the reader know you are about to finish.
I'm pretty sure its A but I could be wrong