What significant event does Jonah initially refuse?

Jonah initially refuses to preach to Nineveh, which is a pivotal moment in the biblical narrative. His reluctance stems from his disdain for the Assyrian city known for its cruelty and sinfulness. Jonah's decision to avoid this task reflects his struggle with God’s command, as he feared that the Ninevites would repent and receive God's mercy, thereby sparing them from judgment. This event illustrates themes of obedience, mercy, and the expansive nature of God's compassion, extending even to those whom Jonah believes are undeserving.

The other options do not carry the same significance within the context of Jonah's story. Offering sacrifices and baptizing converts do not relate to his specific mission or challenges in the narrative. Angering the people might occur as a consequence of his actions or messages, but it does not encapsulate the central conflict that arises from his refusal to take God's word to Nineveh as commanded.