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 $1200 to kids attending the prom. The total contribution to GDP of this series of transactions is:

a) $1100
b) $500
c) $2300
d) $1200


d) $1200