Analysis:
Holmes has written many best selling books in the past on neurological cases. All these books are best sellers. He has written latest book in the same series mentions a number of cases of people who lose the ability to speak normally and can only communicate through song.
Clancy, neurologist criticizes Holmes' latest popular book that neurological cases are unjustified. She says Holmes' approach is 'Voyeuristic" and "patronizing".
We need to find the option that weakens Clancy's arguments. Now, Let's check out the options.
A)Attacks Clancy's credentials without any basis.
Option is itself without any basis. B)Assumes that if a book is popular, the author's approach must be justifiable.
Yes. If this is true, Statements of Clancy are strongly weakened. It's the answer.C)Takes for granted the unlikely proposition that there are some people who can only communicate through song.
we don't know whether this is true or false.D)Attacks the character of the author rather than challenging the validity of the methods used.
This flaw of reasoning is called as 'Ad Hominem'. 'neurological cases is unjustified' can not be can not be argued by targeting the Holmes.E)Assumes that if Holmes' approach was valid for one of his books, it must have been valid for all of his books.
It seems to be true, but it is not mentioned anywhere that, approach is valid for any of the book.