Answer:
Option b. The claim that "newborns clearly prefer disposable diapers to cloth diapers" is weak for an argumentative research paper as it does not establish a definite stance on the issue.
Step-by-step explanation:
An argumentative research paper is a style of writing that requires the author to investigate a topic and make a stance on that same topic in a concise and clear manner. In order to do so, the author will make at least one claim in the paper that is the main argument that he/she will support or oppose to throughout the whole paper. The claim that "newborns clearly prefer disposable diapers to cloth diapers" is a weak claim as it is not specific enough to make a stance and to express a main idea. In order to do so, the claim should be followed by the stance that the author has in relation to the topic of disposable diapers vs. cloth diapers.