The playwright wants to illustrate fear to the audience because they fear the anger of Dryas and so he was put into prison for that reason, but maybe sadness as well because of the reason he was send to jail.
That footnote can play a large role in helping Karim better understand the myth, because instead of just listing the source, it gives a bit of history about the subject.
The answer to your question is A. - Them because you are referring to the crumbs and just not something random, in which case you would use "it".
I hope this helps you!
Have a great day!!