To determine how many grams of protein Luisa consumed from eating 3 ounces of pretzels, we first need to know the protein content in pretzels.
Generally, pretzels contain about 3 grams of protein per ounce.
So, for 3 ounces of pretzels:
\[ 3 , \text{ounces} \times 3 , \text{grams/ounce} = 9 , \text{grams of protein} \]
However, based on the options you provided, the closest choice is 8.79 g. It seems there may be a slight variation based on the specific brand or type of pretzels, but among the given options, 8.79 g would be the most reasonable choice.