The proper use of a conclusion is to restate the main argument or claim so I would go with A). To reinforce the primary claim.
Answer:
Thirstily, the glass of water was swallowed in just one gulp.
Explanation:
Sorry if it's wrong
The Vocabulary was rich and interesting. Is what I think it is.
Rounded to the nearest hundredth, 6.88 would still be 6.88
Being able to have a sticky piece of paper and to have reminders or good notes on it