Answer: B "Which States Would Gain Or Lose House Members?"
Explanation:
From the article "5 visuals explain the shifting House seats and how the changes could affect the 2022 midterm elections," the section that best explains why the 2020 Census was detrimental for Democrats is the one titled "Which States Would Gain Or Lose House Members?" As the title describes, this section explains that, as a result of the 2020 Census, the States that gained seats were mostly Republican-leaning, while the States that lost seats were mostly Democratic.
