New Century Product is a company that was founded last year and is actively traded on a public stock exchange. While the outlood for the company is positive, it currently has negative earnings. If you wanted to measure the progress of this firm, which one of the following ratios would probably be best to monitor given the firm's current situation?

a. Price-sales ratio

b. Market-to-book ratio

c. Profit Margin

d. ROE

E. ROA