When does a default analytics session expire? google analytics individual qualification?

Q. When does a default analytics session expire? google analytics individual qualification?

A. When a user is inactive on a webpage for more than 30 minutes

B. After 30 minutes, regardless of user activity on a webpage

C. At noon every day

D. When a useropen a new browser window

Correct Answer Is :

A. When a user is inactive on a webpage for more than 30 minutes