Arthur Sells $100 Worth of Cotton to Bob

Arthur sells $100 worth of cotton to Bob. Bob turns the cotton into cloth, which he sells to Camille for $300. Camille uses the cloth to make prom dresses that she sells to Donita for $700. Donita sells
The dresses for $1,200 to kids attending the prom. The total contribution to GDP of this series of
Transactions is

A) $1,200.
B) $500.
C) $2,300.
D) $1,100.