What was the punishment Cassandra faced for rejecting Apollo?

Cassandra, in Greek mythology, was granted the gift of prophecy by Apollo, who fell in love with her. However, after she rejected him, he cursed her so that while she would still have the ability to predict the future, no one would believe her prophecies. This led to her dire warnings, particularly about the fall of Troy, being ignored, resulting in tragic consequences. The essence of her punishment revolves around the tragic irony that although she possessed foresight, the very knowledge she shared was rendered useless due to disbelief.

The other choices represent different scenarios that do not align with the mythological account of Cassandra. Losing the ability to speak would not accurately reflect her situation, as she was not silenced but rather disbelieved. Being turned into a monster or banished from Troy are also not part of her myth; instead, her punishment was specifically tied to the gift of prophecy that became a curse. This aspect of her story highlights the themes of knowledge, curse, and tragedy that are central to her character in mythology.