Beyond his prophetic role, what was Amos's primary occupation before God called him to prophesy against Israel, highlighting the unexpected nature of God's calling?

A A skilled craftsman renowned for building temples and sacred objects. B A shepherd and a dresser of sycamore trees, indicating a humble and rural background. C A wealthy merchant who traded in luxury goods with foreign nations. D A scribe who served in the royal court, documenting the history of the kingdom.