Based on the text, it can be concluded that

c) integrated cultural materials, as it were, are yet to be published.

The text hints at there being a lack of integrated material, until the problem is patched up, it's up to the teacher to gloss over the issue and trundle alomng with his routine to conduct a productive class.

Resposta no 2° periodo do 2°p, onde diz o material não está ainda disponível.