a man who a mother claims has parented a child is a(n)\no legal father.\no adoptive father.\no presumed…

Brief Explanations:

In legal - terms, when a mother claims a man has parented her child, he is called an alleged father. A legal father is legally recognized as such, an adoptive father has legally adopted the child, and a presumed father has a legal presumption of paternity based on certain circumstances. Here, it's just a claim, so alleged father is correct.

Answer:

D. alleged father