Social harmony can be defined as the state of well-being and peace between the different individuals that make up a society. Thus, the main objective or component of this concept is precisely the possibility of this society to develop with total normality, avoiding political, religious or cultural conflicts between its different members, tolerating ideological differences or criteria, and considering the differences as enriching and not as causes of conflict.
Firms can use marginal analysis to dispose the price so the profit maximization occurs. They can reach that from the analysis of fixed costs, variable costs and knowing the real price of the product in the market. Keep in mind that if the total of the costs is very close to the price of the product in the market there will be no profits.
The answer is false: random walk hypothesis (a theory which states that stock market prices cannot be predicted because they are dictated by random walk) is consistent with the efficient market hypothesis which states that stock market or asset prices are a reflection of new or existing information.