Final answer:
The conversion factor between the English and metric units can be written as 2.0 L : 67.6 fl oz, which has 1 significant figure. Correct option is c.
Step-by-step explanation:
To derive a conversion factor between English and metric units using the given information, we can use the fact that 1 liter is equal to approximately 33.814 fluid ounces (fl oz). Therefore, the conversion factor between the two units can be written as:
2.0 L : 67.6 fl oz
This conversion factor has 1 significant figure because the stated conversion ratio has only 2 significant figures. We can justify using 1 significant figure in the conversion factor because both the given volume measurements have only 2 significant figures.