Final answer:
Karan's key responsibility as an assignment editor is to determine the priority of news stories needing coverage.
Step-by-step explanation:
Karan's key responsibility as an assignment editor will be to determine the priority of news stories needing coverage. This means that Karan will be responsible for deciding which news stories are most important and should be covered by the news company. He will assess the relevance, impact, and significance of different stories and allocate resources accordingly.
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