Answer:
C) 8.75%
Explanation:
Number of periods = 4 years
Given return rates = 20%, -10%, 20%, and 5%
To obtain the arithmetic average annual return, add the return rates given for all periods and divide the sum by the number of periods.

Over four years, the S&P 500 index delivered an arithmetic average annual return of 8.75%.
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Explanation:
Define the markets, people, and environments you are addressing
These firms do not have perfect market information to know all the price charges by different sellers,the quality the market demand and supply is etc.
Answer:
Consider the possible advantages and drawbacks of a decision.
Explanation:
In Financial accounting, costing is the measurement of the cost of production of goods and services by assessing the fixed costs and variable costs associated with each step of production.
Cost-benefit analysis is also known as the break even analysis, it is an important tool in predicting the volume of activity, the costs to be incurred, the sales to be made, and the profit to be earned is. It is used to determine how changes in differing levels of activities such as costs and volume affect a company's operating income and net income.
Generally, to use the cost-benefit analysis, financial experts usually make some assumptions and these are;
1. Sales price per unit product is kept constant.
2. Variable costs per unit product are kept constant and the total fixed costs of production are kept constant i.e costs can be divided into fixed and variable components.
3. All the units produced are sold i.e there is no change in inventory quantities during the period.
5. The costs accrued are as a result of change in business activities.
6. A company selling more than a product should simply sell in the same mix i.e the sales mix is constant.
Hence, a business performs a cost benefit analysis when it consider the possible advantages and drawbacks of a decision i.e whether or not it would bring value to the company or create a significant level of impact on the business.