We took a bus ride to Tulum to visit the Mayan ruins . Our tour guide , Manuel , was very knowledgable about the ruins and the Mayan culture and lectured on the interesting points as we drove along . We stopped on the way to buy some souvenirs from the locals .

Question: Why is Manuel so knowledgeable ?
Answer: He has studied Tulum historyHe has lived in the ruinsHe has studied Mayan historyNone of the above choices .