Answer:
a) a positive externality
Step-by-step explanation:
Higher education is a clear example of a positive externality. This is because producing highly educated individuals provides a large number of benefits to the overall society that was not part of creating this college graduate, therefore being a third-party but still benefiting from this scenario. The benefits that a highly trained and educated individual can bring to a society is huge and affects different areas such as architecture, economics, society wellness, etc.