Answer:
B. is a particular set of institutional arrangements and a coordinating mechanism used to respond to the economizing problem.
Explanation:
Economic system - 
It is the system that is responsible for the resource allocation , production and the distribution of the services and goods , is known as an Economic system . 
Economic system includes - the institutions of decision-making , agencies .
It works to deal with the problem related to the economy of a country or society .
Hence , the correct option is ( b ) . 
 
        
             
        
        
        
Okay. So Joan receives 25% commission on the profits of the cars she sells. She got $8,870 on the profit last month. To find the commission, let’s multiply the amount of profit by the percentage. 8,870 * 0.25 is 2,217.5. There. Joan earned $2,217.50 in commission last month.
        
             
        
        
        
Answer:
0.40
Explanation:
The four firm concentration ratio = 10%+ 10% + 10% + 10% = 40% =0.40
I hope my answer helps you 
 
        
             
        
        
        
 There are several ways you can find a record. The easiest way is by using  the find command. You can do this by pressing the combination keys Control + F. You will then see a mini search box in the top right corner of your screen.   Lastly, type in the word, phrase, or record that you want to find.  You will then be directed to several highlighted words, and TADA! :D 
Hope this helps  :)
 
        
             
        
        
        
It's D. Increasing the reserve requirement on banks