Final answer:
A credit balance of $16,000 in the Allowance for Doubtful Accounts indicates that RedGrass Inc. has overestimated its bad debt reserve.
Step-by-step explanation:
If RedGrass Inc. had a credit balance of $16,000 in its Allowance for Doubtful Accounts, this indicates that the company has overestimated its bad debt reserve. The Allowance for Doubtful Accounts is a contra-asset account that represents the amount of accounts receivable that are estimated to be uncollectible. A credit balance suggests that the company has set aside more funds than necessary to cover potential bad debts.