How is state typically managed in the browser interface?

How is state typically managed in the browser interface?

A.
generally through the use of cookies in the browser

B.
in the caching layer

C.
State is not managed. All modern UIs are stateless.

D.
The services tier manages state and the client tier is stateless.

Explanation:
The State Management component is responsible for maintaining the current state
of
the user interface. For browser interfaces, this is frequently implemented via cookies.
Reference: Oracle Reference Architecture, User Interaction, Release 3.0