Question

enticing people to drink recycled water, however, requires getting past what experts call the “yuck” factor. efforts in the 1990s to develop water reuse in san diego and los angeles were beaten back by activists who denounced what they called, devastatingly, “toilet to tap.” los angeles built a $55 million purification - plant in the 1990s, but never used it to produce drinking water; the water goes to irrigation instead. but with the special purification plant, which has been operating since 2008, orange county swung people to the idea of drinking recycled water. the county does not run its purified water directly into drinking water treatment plants; instead, it sends the water underground to replenish the areas aquifers and to be diluted by the natural water supply. this environmental buffer seems to provide an emotional buffer for consumers as well. which reason in this passage shows that it is possible to convince people to use recycled water? most experts reject the “yuck” factor. environmentalists support recycling water. orange county has a successful water program.

Explanation:

The passage mentions that Orange County has a successful water - reuse program since 2008 and has managed to swing people to the idea of drinking recycled water. The other options either don't directly show success in convincing people (rejection of "yuck" factor by experts doesn't mean people are convinced, and environmentalists' support doesn't equal public acceptance) or are not mentioned as a reason for convincing people.

Answer:

Orange County has a successful water program.