Which sentence is closest in meaning to "Nos vemos todos los sábados"?

a. We see them every Saturday
b. You see us on Saturdays
c. We see each other every Saturday
d. I will see you on saturday

I know it is either B or C but I'm still stuck :(
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Which word best completes the sentence?

Yo ________ un libro y despues fui a casa.

a. compraba
b. compro
c. compró
d. compré

If it is b or c can you please explain to me what the accent means or why the accent shouldn't be there? Thanks!