I chose option D
D) I continue to market just like before to any english reading players regardless of where they live.
You can try to focus on players by their location as much as you would like but at the bottom line.. Does it really ensures that you will get 100% of your target audience? Of course not.
My top earners are Microgaming and most of the MG’s I work with do continue to accept US players as long as they are able to deposit.
The only change I had to do was to add geo targeting to my sites to show US visitors offers only from sites that will accept them.