While many people in 1920s Amercia enjoyed new consumer goods and luxuries, some groups, such as farmers and those employed in traditional heavy industries, experienced extreme poverty. This, together with social inequality and racism, resulted in increased tensions across the nation.
<span>The cause of such “hypoxic” (lacking oxygen) conditions is usually eutrophication, an increase in chemical nutrients in the water, leading to excessive blooms of algae that deplete underwater oxygen levels. </span>
I believe the answer is D
