/lit/ - Literature

I can't decide the appropriate intensity level for the conflict in my story. What sounds best?

>Level 1
There's a timed sale for eggs in the local grocery store until 6, but the MC has to stay for overwork until 5.30.
>Level 2
Strange stuff happens at MC's relative's school and detective novelist MC autistically deduces the truth each time based only on secondhand reports.
>Level 3
Gangsters plot kidnapping the daughter of a super rich family and the hardboiled ex-police MC has to stop them.
>Level 4
There's a war going on and veteran MC has to fend off foreign agents who seek to sabotage vital industries, while tackling PTSD on the side.
>Level 5
Monsters from other dimension randomly invade Earth in hordes to eat people and tech wizard MC develops magic weapons to repel them and protect the Earth.

If you do nothing, all the captives will die.
If you use the switch, the trains will crash and one captive will die.
It is unknown how many passengers are on each train besides the driver, maybe none, but if there are some, they are all guaranteed to die in the crash.

What will you do?