What is the primary predication in “الشَّمْسُ مُضِيئَةٌ”?

ʿIlm al-Maʿānī: Khabar, Inshāʾ and the Purposes of Reporting

• Necessarily one isolated act of producing light
• A command to the listener
• Attributing brightness to the sun
• Necessary omission of the agent