You are facing an event that will make you fall into a loop lasting 100 or 10.000 years, that resets every 20 years (bad sci-fi script 😀 - groundhog day themed), given 2 paths as possible outcomes, what would you go for?
You know that it can be one of the two because of some crazy invented physics. Thus after 100 years you either get out of it or discover if it's the 10K.

Time bubble 1 = 100 years

1) math
2) linguistics
3) biology
4) chess

Time bubble 2 = 10.000 years
This one I can't answer but with "everything I can put my hands on".
10K is huge.