Cadmus was the founder and first king of Thebes and he invented the alphabet. Also, he was considered a slayer of monsters. Born of Cadmus should mean born of someone illustrious, and connected to important figures in Greek mythology like Zeus for example.
A) Pious. It means devoutly religious
The first one is your opinion. the second ones answer is: easily, because you can find them in libraries. The third is: Romeo and Juliet and many other Shakespeare poems. The fourth is opinionated also.