The government of Filvia has mandated that the standard minimum wage in the country be increased to $8,000 per year. This has ensured that all firms in the country pay their employees at least $8,000 per year, which has brought about a higher standard of living for the people of Filvia. Which of the following factors in a firm's general environment does this mandate best indicate?
a. ecological factors
b. sociocultural factors
c. technological factors
d. legal factors