Teenagers Drink More Soft Drinks Than Other Age Groups

Teenagers drink more soft drinks than other age groups. If the number of teenagers increases, everything else remaining the same,

A) market demand for soft drinks decreases.
B) market demand for soft drinks does not change.
C) there is a movement along the market demand curve for soft drinks.
D) market demand for soft drinks increases.
E) None of the above answers is correct because the effect on demand depends whether the supply curve shifts rightward, leftward or not at all.