Which of the following sentences is punctuated correctly?
A.
Viet, who desperately needed an idea for his paper—had a moment of brilliance at lunchtime.
B.
Viet who desperately needed an idea for his paper, had a moment of brilliance (at lunchtime).
C.
Viet, who desperately needed an idea for his paper had a moment of brilliance, at lunchtime.
D.
Viet, who desperately needed an idea for his paper, had a moment of brilliance at lunchtime.