【单选题】Heracles and his twelve laborWhen Hercules grew up and had become a great warrior, he married Megara. They had two children. Hercules and Megara were very happy, but life didn't turn out for them the ...
A.
Eurystheus had a reputation for being mean.
B.
Hercules knew that the king would give him a tough time
C.
The hero had to serve Eurystheus for twelve years.
D.
When the tasks were completed, Hercules would become immortal.