The correct answer is letter "B": legislation cannot repeal basic economic motives.
Explanation:
Government price controls are regulations imposed by the central government of a country to set limits on prices of certain goods or services because of a surplus, shortage or simply to maintain the demand and supply of those products at their equilibrium level.
However, the demand for some of those products could be unpredictable because individuals could react in opposite directions even if the government has set rules against consumers' favor. <em>Customers' motives might not be always repealed by legislation</em>.
The chi-squared test tests whether distribution of a population of something (such as people, traits etc) into categories deviates significantly from expected values.
The degrees of freedom represents the number of independent ways by which a system can change. The degree of freedom is always the number of categories being analyzed minus 1.
Therefore, the degrees of freedom in this example is 5-1 = 4
