CSS Forums - History of USA vs Islamic History and Culture

Hi. I hope everyone is doing well.

I just joined CSS forums and I need guidance from the seniors in a subject selection matter.

I have to choose bw History of USA and Islamic History and Culture. I've heard a lot about History of USA that it is a high scoring subject and has a shorter syllabus as compared to IHC. But I think that choosing IHC will also help you in Islamic Studies which is a compulsory subject. Further, I've interest in both Islamic History as well as USA but my memory is quite weak. Please suggest me which one to go with.

I'm a Computer Science graduate so my other subjects are

Computer science (200)
History of USA/IHC (100)
Geography (100)
Gender Studies (100)
??? (100) Please suggest another easy / high scoring subject