TRUE.
The labor-supply curve is affected by the trade-off between labor and leisure.
The  opportunity cost of leisure depends on the wage rate, it increases and people supply more labor. Main factors determining the labor supply curve how desirable the work appears to its employees relative to the alternatives available in the market.
Other factors that encourages are government policies and procedures that are labor and trade effective or not. The quantity of workers trained for a particular job specifications. The number of workers in economy and the education required further.
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Option B, In a(n) , common market members eliminate internal trade barriers, adopt a common external policy toward nonmembers, and eliminate barriers to the movement of the factors of production.
A legal agreement that creates a collection of nations that adopt a single external policy  tariff is known as a common market. Countries that participate in a single market also permit free commerce as well as the free movement of capital and labor within the group's members. It establishes a common external tax on imports in the market. Members of this market thus do away with trade restrictions and embrace or adhere to a common policy.
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<span>b. False. Labor unions include workers of all skill levels and prefer opportunities for advancement.</span>
        
             
        
        
        
The meta-analysis is the best represent as a statistical action, that which involves quantitatively pooling the data from a group of independent studies that have studied the same or similar clinical problems, by using the same or similar research methods.
        
             
        
        
        
Explanation:
The adjusted journal entry is shown below:
Corp Laundry supplies Expense A/c Dr $6,580
        To Corp Laundry supplies A/c $6,580
(Being the corp supplies expense is recorded)
It is computed below:
= Purchased value of laundry supplies - still on hand 
= $7,990 - $1,410
= $6,580
The answer is correct but The options that are given are incorrect.