PT 63 S3 Q9

Long-term and short-term relaxation training are twocommon forms of treatment ... ...

Which one of the following, if true, most weakens the argument?
(A) A decrease in symptoms of anxiety often occurs even with no treatment or intervention by a mental health professional.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2011 LSAT (PT 63): Logical Reasoning B