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Mavisdu1017
A vs B? I think “income” is uncountable noun...but why OA is A?
Anybody could help? Thanks.

Hello Mavisdu1017,

We hope this finds you well.

To answer your query, in this sentence, the phrase "household incomes" refers to the individual incomes of each household, so in this context "income" is a countable noun because the income of each house exists as a discreet and distinct entity.

We hope this helps.
All the best!
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