When asked to write about "at least" one text, that's just code for "write about two or more texts, but for the love of god do at least one".
If it asks you to write about "ONE", it means one. If you're worried, consider how that representation of that (whatever it is) effects the responders perspective.
Remember, the module is NOT!!!!!!!!! conflicting perspectives, it is REPRESENTATION AND TEXT. Your argument, I'm assuming (I'm doing h+m), has to be about how conflicting perspectives affect the way a text is represented... or whatever.
Emphasise how that text (and your prescribed) are specifically made to influence our (the responders) perspective of the event.
However, I bet module c will not ask for just one text. It will be a "at least ONE other text of your own choosing" question. They want conflicting perspectives from those of you studying that, referring to one other text will not other that...
Are your prescribed and "other" texts on the same topic? That will help, just in case... =O
(Students in my elective can choose different texts of different whatever's to emphasise history and memory.)