Gabriel is an environmentalist with very strong beliefs about who should pay for environmental cleanup. what is most likely to be gabriel's view?

Gabriel’s view on environmental cleanup could be most likely that since business have environmental costs' no matter what, business in the first place should pay for it, and this would cause a higher cost on consumers.

That view is the idea that the responsibility for the environmental cleanup should be by business and consumers, and Environmental Costs should be fixed cost like rent or insurance.                               

the answer is d.index

the answer to your question is,

old stone age.

-mabel < 3