Option 1 would cause train to leave at 10:30PM and at 300 km/h could not reach destination by midnight.
Option 2 doesn't seem reasonable, as passengers still don't make connection.
Option 3 costs $12K but passengers make their train
Option 4 costs nothing, and passengers (barely) make the train. 40% of 300 kmh is 120 kmh. with 5.5 hours until midnight, the train can travel 660 km. They only need to go 620 km. So, they just make their connection.
Go with option 4.