one of the main disadvantages of buying a franchise is that you may end up 
            a.  choosing a poor location.    b.  feeling like an employee.    c.  hiring a large staff.    d.  paying too much for operating costs. 4.

D. paying too much for operating costs.

Explanation:

There is the initial money spent to buy the franchise, you continue to pay management fees and you also possible will have to agree to buy products from the franchisor. It all leads to high operating costs.

So the correct answer is:

D. paying too much for operating costs.

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.'