B) The name of the one was Obstinate and the name of the other Pliable. Now, by this time, the man was a good distance from them; but, however, they were resolved to pursue him, which they did, and in a little time they overtook him.
The names of characters from Bunyan's The Pilgrim's Progress reveal their characteristics.
Obstinateis the synonym of stubborn, meaning refusing to change one's course of action or opinion. Obstinate is one of Christian's neighbors in the City of Destruction. Together with Pliable, he runs after Christian to bring him back but stubbornly refuses to join him on his journey, unlike Pliable, who does so despite thinking it's nonsense.
Pliable means easily bent and easily influenced. Pliable follows Christian on his journey until both of them fall into the Slough of Despond. Pliable manages to escape from the slough and returns home. His name also fits his character - he does things for a little while and then gives up on them, lacking will.