Answer:
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And this is the correct answer:
Explanation:
The use of cow manure to power facilities and fuel milk tankers is a managerial challenge directly related with the sustaniable aspecto of the Farm.
This is because a natural resource: cow manure, is being used in an efficient manner to provide much needed power to the firm's facilities. The amounts of manure, times, and processes that are used, are all part of the sustainability policy of the farm, which has to be overseen by the manager.