assalam o alikum,

I am preparing for css 2017 but i am still not done with optional subjects. in start i choose
1) IR
2) History of USA
3) Sociology
4) Gender studies
5) Business Administration

but now i want to study criminology but i am really confused because to study criminology i have to skip one subject.. i need advise which subject to skip in order to study criminology either Sociology or History of USA
(i don't want to skip any other subject that is why just mentioned these two)
need serious guidelines please , also give reasons for your suggestions as it would be very helpful for me to decide then..
Thank you