By mass, a compound is made up of $40.0\%$ carbon, $6.7\%$ hydrogen and $53.3\%$ oxygen. Its relative molecular mass falls between 55 and 65. What is the molecular formula of this compound?
- A$\text{CH}_2\text{O}$
- B$\text{C}_2\text{H}_4\text{O}$
- C$\text{C}_2\text{H}_4\text{O}_2$
- D$\text{C}_2\text{H}_6\text{O}_2$