The following data pertain to Duffy Corporation. What is Duffy's return on common equity (ROE)?

Accounts receivable	$490,000
Annual sales	4,800,000
Earnings before interest and taxes (EBIT)	350,000
Interest expense	70,000
Net fixed assets	2,400,000
Net income available to common shareholders	168,000
Total assets	4,540,000
Total common equity	2,210,000

A.) 3.7%

B.) 15.8%

C.) 7.9%

D.) 7.6%