Imagine you are a participant in the 1967 study by leventhal and colleagues, in which participants either (a) watched a scary film about lung cancer, (b) read a pamphlet of suggestions for how to quit smoking, or (c) watched the scary film and also read the pamphlet. according to the results, you would be most likely to quit smoking if you were in condition

Watched the scary film and also read the pamphlet

Explanation:

In this study performed by Leventhal, smokers were exposed to different kind of communications related to the dangers of smoking, the intention was to awake fear to smoke.

In the study they manipulated:

Intensity of fear stimulusReceipt of instructions on how to stop smokingSmoking during the communication

Different results were seen, one of them was the effect of this high-fear communication made the desire to stop smoking higher but did not really have effect on the actual smoking behavior.

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)

Olfactory epithelium i believe