In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. 

Bottled water sales (1) _______ booming worldwide. It is now the most popular (2)_______ in the U.S., with consumption growing every year. It is portable, safe, and (3)_______ stored. It is also arguably the most unnecessary consumer product a drink (4)_______ in most places from the tap for free, packaged and shipped at great cost to the environment, and(5) _______ at exorbitant prices. Understanding the drivers of bottled water (6)_______ is a first step to making the industry more sustainable. Andrew Szasz, a sociologist at UC Santa Cruz who has studied bottled water (7)_______ for more than a decade, contends that the industry(8) _______ because people began to distrust their local water sources. Lured by slick marketing, consumers turned to bottled water to protect themselves from (9)_______ threats. The water poisoning crisis in Flint, Michigan, has (10)_______ to consumers’ concerns.