<span>With the given statements in the choices presented, the one that is not correct about the drugs and supplements is that these are ineffective and expensive. As it can be observed, most of them are affordable to accommodate the needs of the general public. These substances are also effective as they are use to relieve many diseases. </span>
This would be an example of classical conditioning. This is almost exactly what Pavlov did with his dogs.
B I think. Hope it's correct.
