My Diary I learned that modal adverbs are (1).
They are used to
(2).
The words possibly, certainly (3),(4),(5),(6),and(7)
are some examples of modal adverbs.
They may mean similar to modal verbs ang modal nouns because(8)
However, they are different
to modal verbs and modal nounsbecause
(9).All the three modal expressions are (10)

a-he encouraged islamic schools to introduce greek texts.

d-he invited greek scholars to teach their texts to the locals.

explanation:

the transmission of the greek classics to latin western europe during the middle ages was a key factor in the development of intellectual life in western europe.[1] interest in greek texts and their availability was scarce in the latin west during the earlier middle ages, but as traffic to the east increased so did western scholarship.

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