Answer:
The sentence which provides the BEST conclusion to the summary is:
There are no regulations in place for bottled water.
Step-by-step explanation:
From the given passage, we see that the Chairwoman revealed the high consumption of bottled water in the United States despite it high cost. Also, tap water seem to be more regulated than bottled water. Therefore, it can be concluded that it is due to the no regulation of consumption of bottled water that increased its consumption in United States.