To calculate the cash received from customers, adjust the revenue by the net change in accounts receivable for the year. The formula is:

Cash Received = Revenue - (Ending Accounts Receivable - Beginning Accounts Receivable)

Substituting the given values:

2,100 - (230 - 200) = 2,070

Option B is incorrect because it adds the change in cash to revenues instead of adjusting for accounts receivable. Option C is incorrect because it adds the change in accounts receivable to revenue rather than subtracting it.