Answer: C. Even the proud can be humbled, and God is not to be mocked.
These are the two themes that are better expressed by the passage. The passage tells us that Nebuchadnezzar believed himself to be powerful and strong, and he thought that even God could not take away his privileges. However, he was humbled by God, who made him believe he was an ox. When the king regained his senses, he recognized the power of God. This shows that even the proud, such as the king, can be humbled. It also shows that God is not to be mocked.