Final answer:
The Schachter-Singer two-factor theory provides evidence supporting the theory of mere presence as a better theory of arousal than evaluation apprehension.
Step-by-step explanation:
The evidence supporting the theory of mere presence as a better theory of arousal than evaluation apprehension comes from the Schachter-Singer two-factor theory. This theory suggests that emotions are composed of both physiological and cognitive factors. In an experiment conducted by Schachter and Singer, participants who were told to expect physiological arousal from an injection of epinephrine attributed their arousal to the context and interpreted it as a change in emotional state. On the other hand, participants who were not expecting arousal did not attribute their arousal to the context. This experiment provides evidence that cognitive appraisal plays a critical role in attributing emotions to physiological arousal, supporting the mere presence theory over evaluation apprehension theory.