Answer:a. Phil should not use the article because William Shatner is a biased source.
Step-by-step explanation:
William Shartner is a paid individual for this commercial and when someone is paid to do a commercial they only have to say something positive about that product of that company which pays them because they are paid to do so .
The information that William gives is likely biased because it will be based on what he will be told to say.
William is paid to market the company hence he will be influenced by personal opinion that the company holds and he will share the values of the company which are based on the opinions of that company.
The research need to give ideas that are not individually based or influenced by personal feelings and opinions but which are objective or only facts.