In the island of the blue dolphin story

So know lets geta real question what does this actually mean

One form of plagiarism involves a. using an author's organization or sentence structure without citation. b. referring to information that is common knowledge. c. introducing a quotation with a signal phrase. d. restating an author's ideas in your own words with a citation.

Which sentence uses the correct form of the verb? the house don't have a basement. the house doesn't have a basement. the house do have a basement.