How many ounces are in a 1 liter jar?

To convert liters to ounces, it's essential to use the correct conversion factor. One liter is equivalent to approximately 33.8 fluid ounces in the United States measurement system. When you are given a jar that holds 1 liter, you can directly apply this conversion factor to determine the volume in ounces.

Therefore, since 1 liter equals 33.8 ounces, the answer accurately reflects the capacity of the jar. This measurement is particularly useful in various contexts, such as cooking or medication dosing, where precision in volume is crucial. The other options indicate incorrect conversions that do not align with the standard measurement equivalence for liters to ounces.