How does the detail "The plumber might not want a haircut, but he can work for the hairdresser and earn credit to use with someone else" best support
the central idea that time banks are a convenient way to get things done?

i'm not good at running

following gollum to the back entrance

which sentence refers to a dynamic character?

b.

a man learns empathy after working with those he formerly judged.

hope this answers your question!

because it is questonabile