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Katlin wants to make $64$ ounces of chocolate milk that is $12\%$ chocolate. She has light chocolate milk that is $5\%$ chocolate and heavy chocolate milk that is $21\%$ chocolate. How many ounces of light chocolate milk and heavy chocolate milk does Katlin need to combine?$\newline$Choose $1$ answer:$\newline$(A) $24$ light and $40$ heavy$\newline$(B) $28$ light and $36$ heavy$\newline$(C) $36$ light and $28$ heavy$\newline$(D) $40$ light and $24$ heavy