Final answer:
Social facilitation is most likely to occur in simple tasks as the presence of others enhances performance on tasks that are well-practiced or straightforward.
Step-by-step explanation:
Social facilitation is a psychological concept that refers to the tendency for people to perform differently when in the presence of others than when alone. When it comes to the type of tasks where social facilitation is most likely to occur, research suggests that people are more likely to experience social facilitation effects when performing simple or well-practiced tasks in front of others.
This is due to the increased arousal that the presence of others produces, which can enhance performance on simple tasks but may hinder it on more complex tasks. Therefore, the correct answer to the question 'Social facilitation is most likely to occur in the performance of ________ tasks.' would be c. simple.