On December 31, 2016, Hanover Corporation had the following account balances:

Cash	$ 24,000
Service Revenue	73,000
Advertising Expense	12,000
Accounts Receivable	20,000
Salaries Payable	2,000
Land	15,000
Retained Earnings, 1/1/2015	18,000
Salaries Expense	28,000
Common Stock	10,000
Dividends	4,000

What is Hanover's balance in Retained Earnings after the temporary accounts are closed at the end of its 2016 accounting period?

a. $51,000

b. $47,000

c. $79,000

d. $91,000