Which of the following statement is CORRECT? A. A sunk cost is any cost that must be expended to complete a project and bring it into operation. B. An example of a sunk cost is a situation where Quiznos restaurant opens a new store and that leads to a decline in the sales of one of the firms' nearby franchises. C. An example of a sunk cost is Walmart incurred and expensed costs to open a new Walmart store and the costs cannot be recovered if Walmart decides not to go forward with the opening of the new store. D. A sunk cost is any cost that was expended in the past but can be recovered if the firm decides not to go forward with the project.

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ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

i would say that they would most likely use a e-mail

explanation:

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