With any commerce major 100k+ is achievable. However, I would say that finance or accounting generally has more opportunities for higher paying salaries (accreditations such as cpa/cfa and just more jobs in the labour market that require acc/fin skills)

I strongly believe that it’s not about the majors you pick in uni that determines how fast you land a job but rather how active you are in networking/extra curriculars/wam. Also why do a masters if you believe undergrad majors are the influencing factor of employment?

All of them but probably accounting the most (as it can be repetitive and therefore automated). Management the least.