Alice is married to Bob, making him her husband. Carol is Bob's daughter, which means Carol is the child of Alice's husband. Since Carol is Bob's daughter and Alice is married to Bob, Carol is also Alice's daughter by marriage, assuming that Alice is not Carol's biological mother. Being the child of Alice's husband, Carol would be considered Alice's stepdaughter, if not her biological daughter.

Dave is Carol's cousin on her father's side, indicating that Dave shares a grandparent with Carol through Bob's family as Bob is an only child. This is because cousins typically share at least one set of grandparents. If Bob is Dave's uncle, then one of Bob's parents is Dave's grandparent.

Carol cannot be Alice's niece because Carol is Bob's daughter, and Alice is Bob's wife. For Carol to be Alice's niece, Carol would have to be the daughter of one of Alice's siblings, which is not the case described here. Therefore, based on the relationships given, Carol is either the biological or the stepdaughter of Alice, and she cannot be Alice's niece.
Alice is married to Bob, who is an only child. Carol is Bob's daughter. Dave is Carol's cousin on her father's side. Explain the relationship between Alice, Bob, Carol, and Dave. Can Carol be Alice's niece? Why or why not? Provide a short response.