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Be sure to answer all parts. Predict the sign of delta S_sys for each process. Which are positive? A. A pond freezes in winter. B. Atmospheric CO2 dissolves in the ocean. C. An apple tree bears fruit. D. None of them are positive. Which are negative? A. A pond freezes in winter. B. Atmospheric CO2 dissolves in the ocean. C. An apple tree bears fruit. D. None of them are negative.