In قَرَأْتُ الدَّرْسَ صَبَاحًا أَمَامَ الْمُعَلِّمِ, which word is the adverb of time?

Maf'ul Fih: Adverbs of Time

• صَبَاحًا
• الدَّرْسَ
• أَمَامَ
• الْمُعَلِّمِ