Final answer:
The subject of this question is gluten-free bread availability and ordering options, as well as the price of gluten-free bread.
Step-by-step explanation:
The subject of this question is about the availability of gluten-free white bread. The student is asking about the ordering options and price of gluten-free bread. In the given reference, it is mentioned that people with celiac disease cannot consume bread and pasta made with wheat, which contains gluten. Therefore, for someone with celiac disease, it is important to find restaurants or stores that offer gluten-free options. The primary topic of this question is gluten-free food and its availability.