Sue consumes only sub sandwiches and Mountain Dew. Subs and Mountain Dew are complements. If the price of a sub sandwiches increases,

A、Suewillmoveupwardalongherdemandcurveforsubs.
B、Suewillmovedownwardalongherdemandcurveforsubs.
C、Sue'sdemandcurveforsubswillshiftleftward.
D、Sue'sdemandcurveforsubswillshiftrightward.