Read the following article describing a current marine issue

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Explanation:

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The answer is choice e. the decay of nickel-59 into cobalt-59 is a continuous process, and the rate of decay is proportional to the remaining amount of nickel-59. what we observe is the relative amounts of nickel-59 and cobalt-59, and this is what allows us to determine the percentage of nickel-59 that has already decayed to cobalt-59.