In the context of tasting nightjar/ice wine, the amount typically used for tasting is referred to as an "oz," which stands for ounce. When determining the quantity for tasting, the standard measurement is usually 1 ounce. Therefore, the correct answer is:
a) 1 oz
This indicates that when tasting nightjar/ice wine, it is common to use a 1-ounce serving for the tasting experience.
