Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
What is the main idea of the talk

A．Humanism was the basis for the Renaissance.
B．Petrarch was a powerful leader in Italy during the Middle Ages.
C．Cicero was the first humanist.
D．Latin survived during the Middle Ages thanks to scholasticism.