Answer:
charity/ nonprofit organization
Explanation:
In my opinion, the best option would be D. <span>Attach the fragment to sentence (1). We could attach this fragment to the sentence (1) by adding a dash between them. If we wanted to make a standalone sentence of this fragment, we would have to add both a subject and a verb to it (e.g. It is t</span>he most popular purebred breed in the United States, in fact). If we wanted to attach the fragment to the sentence (3), we would have to add a subject and a verb to it, and make a compound sentence, using a coordinator - as it would have two subjects and predicates (e.g. It is the most popular purebred breed in the United States, and/whereas/while <span>the second most popular breed is the Yorkshire terrier.)</span>