2012	2011	2010
Net sales	233,000	204,000
cost of sales	(124,000)	(110,000)
selling and admin expenses	(95,000)	(81,500)
other income
interest	(3,700)	(3,050)
other	100	1175
earnings before tax and extraordinary credit	10,400	10,625
provision for income tax	(4,800)	(4,740)
earnings before extraordinary credit	5,600	5,885
extraordinary credit	-	1,510
net income	5,600	7,395
total assets	202,000	173,000	161,000
long-term debt	24,600	17,400	15,200
common equity	123,000	116,800	112,800
preffered stock	4,000	4,000	4,000
prefferred dividends	280	280	280

Compute the return on investment for 2011:

a.	2.77%
b.	4.93%
c.	5.72%
d.	5.61%
e.	None of the answers is correct.