I'm in sixth grade this might no be right if I were you I would get a second opinion though I think it it letter C.
Answer:
Hhvgj yyhb yy uuuu gyjih tdc
A baking soda, which is used to help baked goods rise during baking is an example of a direct additive. One of the four major purposes of direct additives is to aid in the processing and preparation of food, where baking soda belongs. These leavening is used to preserve the desirable condition of foods.
The word is "they". possessive pronouns are words indicating nouns. The word "they" is refering to the jeans, not the person> Hope this helps!! :))