Answer:
b. If a firm's assets are growing at a positive rate, but its retained earnings are not increasing, then it would be impossible for the firm's AFN to be negative.
Explanation:
AFN represents Additional Funds Needed and that whenever a company plans for expansion it should have resources, generally these are borrowed from outside.
So when the firm is growing positively it have profits with it and simultaneously if there is no increase in retained earnings then it means the company is distributing such profits as dividends, and in that case there will be a positive balance of AFN as, the funds are still needed even in case of profits.
Thus, in no manner the balance of AFN will be negative in this instance.