i just finished my A-levels this year and i picked history as my 3rd option (it was either history or english literature since these were my strongest subjects at GCSE).
i did AQA history during my time at sixth form but it was my worst subject without a doubt. i excelled at it at gcse and although your teachers do make it very clear that GCSE is different from A-level i didn't really think i'd struggle all that much. it's not that i did all that bad but i wasn't at all interested in the course, not to mention the coursework we had to do alongside it. i imagine the course is much easier if you actually enjoy the subject.
perhaps it's better with different exam boards, but i didn't enjoy it at a -level.
but pushing my opinion aside, history is a great subject if you're looking to go into certain subjects as sometimes universities require it, or at least recommend it. it's also great if you're looking to hone in on your research, analysis, and writing skills as there will be an enormous amount of essay writing.
maths is a great A-level choice. very desirable subject and very respected.
not too sure about RE, there was only one girl in my sixth form who picked it at A-level lol, but it seems like a pretty safe option if you want a high grade.