O yes because the summary includes options.
The cost is an expensive habit? not really sure but people who smoke spend a lot of money if they have been smoking for a long time.
Hi!!! the answer is B!! Have a great rest of the day!!!
I would agree with you - the conclusion should leave readers with an important thought at the end.
This thought should never be new, or opposing to the previous ideas you had been writing before. It also shouldn't be confusing, but quite conversely - it should explain everything and put everything in place.
