Which of the scenarios is the best example of Elinor Ostrom's findings regarding common resources? A) Fishermen from a small village are shunned if they do not return small or young fish they catch to the lake. This prevents overfishing.

B) In the U. S. during the nineteenth century, open‑range buffalo were hunted to near extinction because property rights were well defined.

C) Public grazing land is overused by cattle ranchers because there is no way to exclude all ranchers from using the land.

D) Bluefin tuna are abundant because countries around the world disapprove of overfishing.

Rate of return, standard deviation, coefficient of variation personal finance problem mike is searching for a stock to include in his current stock portfolio. he is interested in hi-tech inc.; he has been impressed with the company's computer products and believes hi-tech is an innovative market player. however, mike realizes that any time you consider a technology stock, risk is a major concern. the rule he follows is to include only securities with a coefficient of variation of returns below 1.07. mike has obtained the following price information for the period 2015 through 2018:hi-tech stock, being growth-oriented, did not pay any dividends during these 4 years. a. calculate the rate of return for each year, 2015 through 2018, for hi-tech stock. b. assume that each year's return is equally probable and calculate the average return over this time period. c. calculate the standard deviation of returns over the past 4 years. (hint: treat this data as a sample.) d. based on b and c determine the coefficient of variation of returns for the security. e. given the calculation in d what should be mike's decision regarding the inclusion of hi-tech stock in his portfolio?