A beta coefficient for a stock of o.8 implies a. an 8% return on the market will cause the return on this stock to be 10%. b. an 8% decrease in the market will cause the return on this stock to be 8%. c. a return of 10% on the market will cause the return on this stock to be 8%. d. a return of 10% on the market will cause the return on this stock to be -8%