The answer is: [C]:
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"Radio typically is better than television at conveying complex or very detailed information<span>."
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I am in karachi, because Karachi is a city and you can't be "at" a city. Saying I'm at only works if it a place such as a grocery store or a mall, but does not apply to cities or countries.
He sells the dog to General Miles.
What answer choices are there? No one can give a proper answer without them