What is the most likely effect on the demand curve of an increase in consumer...

Effect of Increased Consumer Preference:

When consumer preference for a good increases, demand rises at all price levels, leading to a rightward shift in the demand curve.

The rightward shift reflects higher quantity demanded at each price point.

Elimination of Other Options:

A & B: Movements along the curve (upward or downward) occur due to price changes, not preference shifts.

D: A leftward shift indicates reduced demand, contrary to the scenario presented.