[Q]: The police officer dropped the gun.
What is the effect?

[A]: The gun went off.


[Q]: A crater formed on the moon.
What is the cause?

[A]: A comet collided with the moon.


[Q]: The man made an error in his calculations.
What is the cause?

[A]: His work was hasty.


[Q]: The woman felt reluctant to switch careers.
What is the cause?

[A]:
She made a lot of money in her current occupation.