Why did martin luther king and his followers oppose the granting of indulgnces?

Luther had a problem with the fact the Catholic Church of his day was essentially selling indulgences — indeed, according to Professor MacCulloch, they helped pay for the rebuilding of Saint Peter's Basilica in Rome. Later, Luther appears to have dropped his belief in Purgatory altogether.

i think it would be reparing roads  

i believe the correct answer is b.