All of the following led to a decline in air quality in Texas cities EXCEPT: a. An increase in medical research facilities. b. An increase in urbanization and industrialization. c. The increased use and popularity of commercial aviation. d. The increased use and popularity of the automobile.

How does the grapes of wrath identify the effects of americans' views on the dust bowl? the story is a depiction of oklahoma farmers and the difficulties they experienced migrating to california. the story accurately describes the impact the california vineyard industry had on migrant workers. the story covers the rise of corporate farming and the devaluation of the small family farms that dotted the great plains. the story is an allegory for the conflicts between american values and the rise of the communist party in the united states.

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