Why did Allāh inform the angels of His creation of Adam?

Imām Ibn al-Jawzī (d. 597 AH / 1201 CE) summarized the scholars' opinions in his book "Zād al-Masīr":

1. Allah Almighty knew there was arrogance in the heart of Iblīs, so He wanted to let the the angels know about him and to show what was preordained for him in His Pre-Eternal Knowledge. [al-Ḍaḥḥāk from Ibn ʿAbbās; al-Suddī]
2. He wanted to test the obedience of the angels. [al-Ḥasan]
3. When He created the Hellfire, the angels became afraid and said, "Our Lord, for whom did You create this?" He said, "For those who disobey Me." They became afraid that some of them would disobey, while they did not know about the existence of other creations besides them. So He said to them: "I will place a successor on earth." [Ibn Zayd]
4. He wanted to show their inability to encompass His knowledge, so He informed them so that they would say, "Will You place upon it one who causes corruption therein?" He answered them, "I know that which you do not know."
5. He wanted to honour Adam by mentioning his authority before his existence, so that they would show him reverence once He had created him.
6. He wanted to inform them that He created Adam to inhabit the earth, even though his creation began in the heavens.