9) The opportunity cost of owning and using a firm's capital is defined as the capital's A) variable cost. B) fixed cost. C) economic depreciation. D) explicit cost. 10) Which of the following is an implicit cost in Jim's business venture? i. the salary Jim could have earned at another job ii. the interest Jim must pay on the loan he incurred to help open his business iii. the interest Jim lost when he used his savings to help open his business A) i only B) ii only i and iii C) D) ii and ii