My options are business marketing, business admin, business management or business studies. theres also a double degree which is communications [advertising] with business [marketing]. i would like to know which courses are easiest to gain a job with, which ones are highest paying and which ones are most engaging. p.s. i am doing the australian education system, probably different to american one.

Either business admin or business management would be the easiest to get a job with. It’s hard to say which ones would be highest pay, they all would be starting off around the same, aside from business studies; which is so general that you would most likely make less money due to getting a lesser job. The double degree would definitely be the most engaging, or just business marketing if you want to know the most engaging out of the single degrees you listed.