Final answer:
The most effective counterclaim against the argument that foreign language classes should not be mandatory in high school is that more jobs now require foreign language skills.
Explanation:
The most effective counterclaim against the claim that foreign language classes should not be a requirement to graduate high school is option D: More jobs than ever before require foreign-language skills. Having proficiency in a foreign language can greatly enhance job prospects in a globalized world where multilingual skills are valued in various industries. For example, in fields like international business, diplomacy, tourism, and translation, fluency in a foreign language provides a competitive edge.
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