Answer:
The amount of accounts receivable Net = 512000
so correct option is b. $512,000 
Explanation:
given data 
Accounts receivable = $605,000
Doubtful Accounts  = $84,000
Accounts Receivable = $93,000 
to find out
amount of Accounts Receivable, Net that will be reported on the balance sheet
solution
we know bad debt expense  is difference between 93,000 and 84,000 i.e 9000
so new balance of Allowance for doubtful debts = 93,000
so we can say The amount of accounts receivable Net is 
The amount of accounts receivable Net = 605,000 - 93,000
The amount of accounts receivable Net = 512000
so correct option is b. $512,000