Flounder corp.’s sales slumped badly in 2017. for the first time in its history, it operated at a loss. the company’s income statement showed the following results from selling 575,500 units of product: sales $2,877,500, total costs and expenses $2,992,600, and net loss $115,100. costs and expenses consisted of the amounts shown below.

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The correct answer is "a.grassroots movements".

Combining the emissions released by fossil fuel burning and  the carbon released via land use change, we get a total of 8.7 gt. since the problem states that the oceans "take up" or sequester  2.4 gt carbon  per year, we subtract that value from 8.7 gt, leaving us with 6.3 gt of carbon. since the problem states that 3.4 gt carbon dioxide emissions end up in the atmosphere, the "missing sink" of carbon takes up 2.9 gt, a value we got by subtracting the 3.4 gt amount recorded from the 6.3 gt carbon left available after the oceans sequester the carbon dioxide.