In this excerpt from Emily Dickinson's poem "Dying," what is the meaning of the word onset?
I heard a Fly buzz—when I died—
The Stillness in the Room
Was like the Stillness in the Air—
Between the Heaves of Storm—
The Eyes around—had wrung them dry—
And Breaths were gathering firm
For that last Onset—when the King
Be witnessed—in the Room—
A. Arrival
B. Beginning
C. Creation
D. Emergence