Which line in the script is a stage direction?

A.
The Importance of Being Earnest

B.
Act III

C.
Gwendolen. The fact that they did not follow us at once into the house, as anyone else would have done, seems to me to show that they have some sense of shame left.

D.
Morning-room at the Manor House.

E.
[Gwendolen and Cecily are at the window, looking out into the garden.]

E. [Gwendolen and Cecily are at the window, looking out into the garden.]

The stage direction in the script is option E: [Gwendolen and Cecily are at the window, looking out into the garden.]