How do the underlined sentences on pages 7-2 advance the author's point of view?

They show that people who do not have access to
safe water must pay for bottled water, at great cost
to the environment.
They show that people who have little regard for
the environment are willing to spend money on
high-quality bottled water.
They support the idea that people should be
concerned about the effects of bottled water
production on the environment.
They support the idea that people drink bottled
water based on quality concerns rather than on
cost or environmental concerns.