Q: Here is a premise:The guests of the party hid behind the couch.

What is the cause?

A: It was a surprise party.

Q: Here is a premise:I received a package in the mail.

What is the effect?

A: The package triggered my curiosity.

Q: Here is a premise:I jumped instinctively in fright.

What is the cause?

A:
I sensed someone approaching me from behind.