We can confirm that it can be challenging to test the reliability of outcomes for acupuncture due to the reason mentioned in option C.
This kind of study depends on both the medical professional and the patient being unaware of who they are attending (in the case of the professional) and being unaware of the exact treatment being received (in the case of the patients). Since this practice can be felt and is executed in direct contact, these studies can be nearly impossible to perform.
We can also confirm that a key component in declaring a treatment a pseudoscience can be that the treatment has been supported by claims that are anecdotal. This means that the scientific method was not implemented and this treatment was not reviewed by others in the community. Therefore, its validity is in question.
Therefore, we can confirm that options C and D are correct for questions one and two, respectively.
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