United Machining's margin was 2% and turnover was 3.0 on sales of $60 million for the year. On the basis on this information__________.

a. net income for the year was $3,600,000, average assets were $10 million, and ROI was 6%.
b. net income for the year was $1,200,000, average assets were $20 million, and ROI was 6%.
c. net income for the year was $3,600,000, average assets were $20 million, and ROI was 2%.
d. net income for the year was $1,200,000, average assets were $10 million, and ROI was 2%.