Which is a theme of "the adventures of theseus"? a. some mysteries are better left unsolved. b. it is as important to be thoughtful as it is to be brave and strong. c. hospitality and generosity are the greatest virtues. d. true friends will sacrifice their lives for one another.

The theme of The Adventures of Theseus is B: It is as important to be thoughtful as well as brave. 

Theseus was a brave young man called Theseus, who went on a journey to Athens. His mother begged him to travel by sea, not over land it was dangerous travelling over land. He insisted on travelling over land and met several robbers and bandits along the way. He handled each situation he found himself in, along the way, with thought and bravery. As a result, he arrived in Athens unscathed.