Final answer:
In instrumental conditioning, a behavior is more frequently exhibited if d)it is reinforced, consistent with the principles proposed by B. F. Skinner and Edward Thorndike's law of effect.
Step-by-step explanation:
According to the process of instrumental conditioning, behavior will be displayed more often by an individual if it is reinforced. This principle stems from the work of psychologist B. F. Skinner, who believed that behavior is motivated by consequences—reinforcements or punishments. The law of effect, established by Edward Thorndike, also supports this principle by stating that behaviors followed by satisfying consequences are more likely to be repeated. Therefore, reinforcement after a behavior increases the likelihood of that behavior being demonstrated again in the future.