What is the unit rate in grams per liter if a two-liter energy drink has 58 grams of sugar?

29 grams per liter
14.5 grams per liter
0.03 grams per liter
2.9 grams per liter

The unit rate in grams per liter is 29 grams per liter, since a two-liter energy drink has 58 grams of sugar.