Your company incurs a cost for factory rentfactory rent, which, in the short run, is fixed. What happens to this cost in the long run? In the long run, the cost of factory rentfactory rent A. becomes a variable cost. B. becomes a nonmonetary opportunity cost. C. remains a fixed cost. D. becomes zero. E. becomes an accounting cost.

A. becomes a variable cost

Explanation:

Fixed costs are the expenses that remain constant in a period. During the period under review, fixed costs do not change regardless of the level of output. Fixed costs are mostly made up of overheads such as rent , depreciation, and administrative salaries.

Fixed cost remains constant in a particular financial year. In the long run,  business budgets and projections tend to change, resulting in changes to the fixed cost. In other words, in the long run, fixed costs will change. Therefore, in the long run, all costs are variable expenses.

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.'

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.