Tamika: Many people have been duped by the claims of those who market certain questionable medical products.
Conclusion
You can't explain the recent trend among medical professionals toward being susceptible to fraudulent marketing claims by saying that they don't have the medical knowledge necessary to see through the seller's fraudulent claims.
Evidence
The medical professionals have no lack of medical knowledge.
Evaluate
The argument itself is pretty short and sweet. You can't explain X's behavior by citing Y. After all, Y wouldn't apply to X.
In more generic Method language, we could say that Tamika .
Goal
Look for any answer whose wording we can match up with the argument.