Somebody wrote to WordReference forums with a 'question taken from an exam', where you have to fill the gap with one of the options given:
"She ____they travelled by bus."
- would sooner
- had rather
- had sooner
I don't know whether it said 'Choose the best option' or 'Choose the correct option', but either way, the answer they gave was 1. - would sooner. But what I'm interested in is whether both the other answers are 'wrong'.