Answer:
c. depends on a number of factors, and can vary from one manager, location and type of employees.
Explanation:
A manager can be defined as an individual who is saddled with the responsibility of supervising and ensuring his subordinates (employees) are working effectively and efficiently with the organization's goals and objectives. 
In Business management or human resource management, span of control can be defined as the number of subordinates or junior level staffs who are directly controlled by a superior (manager). 
Basically, the span of control for a manager depends on a number of factors, and can vary from one manager, location and type of employees.
<em>This ultimately implies that, span of control is directly proportional to the organizational structure and any other factor around them.</em> 
 
        
             
        
        
        
<span>You would receive a tax refund from the IRS if you paid too much in taxes versus what your net income was during the year. The taxes owed is less than what was paid to the IRS during the year. If you receive credits for what you are able to deduct from your net income, then you will be able to receive money back at the end of the year for over paying during the year.</span>
        
                    
             
        
        
        
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An object of interest to the end user is <u>entity</u>.
<u>Explanation:</u>
An entity is a real world object or thing that has an independent existence. Entity is distinguishable from the other objects. The attributes of an entity are the properties of the entity which make the entity distinguishable from the other objects.
The examples of entity are a car, a book or any other product. A set of an entity is known as the entity set. Entity may be an object with physical existence or it may be with a conceptual existence.