Answer: The option that exemplifies the empirical method is D. Dr. Sarkeesian observes and records how watching cartoons influences heart rates.
Explanation: The empirical method is the method used in empirical research. It consists in acquiring knowledge by means of controlled observation and in recording the results of this observation in order to confirm a theory or a hypothesis. Taking this into account, it can be said that option D. exemplifies the empirical method since it makes reference to the two instances that conform this particular method, the instances of observation and record of the observation, in order to study how watching cartoons affects the heart rate.