Final answer:
The argument used to support the passage of the Twenty-First Amendment was that Prohibition was badly enforced, causing people to lose respect for the law.
Step-by-step explanation:
The argument used to support the passage of the Twenty-First Amendment was option C, which stated that Prohibition was badly enforced, eventually causing people to lose respect for the law. During the Prohibition era, the ban on alcohol was poorly implemented, leading to widespread illegal production and consumption of alcohol. This resulted in a decline in public respect for the law and increased criminal activity. The proponents of the Twenty-First Amendment argued that legalizing alcohol would help address these issues by regulating its production and sale.
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