Policy makers around the world often face an "open-economy policy trilemma": 1. they want to fix the nominal exchange rate to promote international trade; 2. they want capital mobility to achieve gains from international borrowing and lending; 3. they want to engage in active monetary policy to stabilize domestic output. (a) using the concepts you have learned in class, explain why this is a trilemma, i. e. why only two of the three objectives can be achieved at any point in time. (b) how does your answer in part (a) us think about why both the gold standard and the bretton woods system eventually failed?

there is no following so id just amuse false

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.'

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explanation:

a.