Answer:
C. Personal selling
Explanation:
In personal selling, a sales representative engages the customer on a one-one conversation in an attempt to persuade them to buy a product or service. The sales person makes us of his or her skill, experience, and abilities to convince the buy the goods or services. Personal selling is also known as face-face selling. 
Personal selling requires a sale representative to have good interpersonal skills.  The salesperson will point out at the salient features and benefits in a bid to convince the customer that the product will add value to them. The customers seek as much information as they desire and gets the opportunity to negotiate for better prices.
 
        
             
        
        
        
Similar to manufacturing, services use methods that add value to the raw materials required to make the finished product. JIT emphasizes the process rather than the end result. Therefore, it may be applied to any set of processes, whether they are involved in manufacturing or providing services.
In the context of the industrial and service industries, the Just in Time (JIT) system: Companies use just-in-time (JIT) inventory strategies to boost productivity and cut waste by only ordering products when they are actually needed for manufacturing, which lowers inventory expenses.
Between service and manufacturing organizations, there are five key differences: the tangible nature of their output; production on demand or for inventory; production tailored to the needs of a particular customer; labour-intensive or automated operations; and the requirement for a physical production location. 
In reality, though, service and industrial firms have a lot in common. Many manufacturers have their own service departments, and both industries need trained workers to run a successful organization.
Learn more about JIT here:
brainly.com/question/16016464
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let the customer drink it?
 
        
             
        
        
        
The oligopoly is known to have a one producer dominating the market. This results in a few suppliers/sellers in the market, and thus can cause a high increase in the price of the products that are being sold in its respective community.
        
                    
             
        
        
        
Answer:
D
Explanation:
Profit is Maximize when MR = MC
since MR=40 - 0.5Q
and  MC= 4
Therefore:
40-0.5Q = 4
-0.5Q = 4 - 40
-0.5Q= -36
divide through by -0.5
Q = 72
since Q = 72
from Q = 160 - 4p
72 = 160 - 4P
-4p = 72 - 160
-4P = -88
divide through by -4
P = 22