Need help with # 4, # 8 and #9

4. Why are estimates of bad debts used to record uncollectible amounts of accounts receivable? O Doing so avoids violating the expense recognition (matching) principle. 0 It is an easier method than waiting for accounts to actually become uncollectible. 0 Because the actual amount of uncollectible accounts can never be known. 0 It is the most conservative approach