Answer:
As a result of the rule limiting the size of the House of Representatives to _435 members, U.S. congressional districts on average now have very substantial populations
It would be D) carbon dioxide (I took the test haha).
Explanation: Well, DSM contains descriptions, symptoms, and other criteria for diagnosing mental disorders.. it's important because It provides a common language for clinicians to communicate about their patients and establishes consistent and reliable diagnoses that can be used in the research of mental disorders.. ❤️I hope this helps❤️