(Figure: Externalities and Network Effects) Based on the Graph, We

Multiple Choice

(Figure: Externalities and Network Effects) Based on the graph, we see that if a consumer joins the social network depicted

A) D_P shifts right and the external benefit remains unchanged.
B) D_P remains unchanged and the external benefit increases.
C) D_P shifts right and the external benefit decreases.
D) D_P shifts right and the external benefit increases.