[Grammar] "What would you have done?" vs." What would you do?"

[acidize]

Hi, non-native speaker here. What is most fitting in the following phrase?

‘Supposing you had run out of money, ____?’ ‘Call my parents, I believe.‘

a. What would you have done?
b. What would you do?

 

[Rover_KE]

Welcome to the forum, acidize.

Where did you find that question?

When do you have to submit the answer to your teacher?