A Medical Journal Published the Results of an Experiment on Anxiety

Multiple Choice

A medical journal published the results of an experiment on anxiety. The experiment investigated the effects ofa controversial new therapy for anxiety. Researchers measured the anxiety levels of 65 adult women who suffermoderate conditions of the disorder. After the therapy, the researchers again measured the womenʹs anxietylevels. The differences between the the pre- and post-therapy anxiety levels were reported. How many levelsdoes the treatment have in this experiment?

A) 2 (pre- and post-therapy)
B) 1 (therapy)
C) 65 (the adult women who suffer from anxiety)
D) 130 (the adult women who suffer from anxiety measured pre- and post-therapy)