Concept:A change in demand means the whole demand curve shifts because a non-price factor, such as income, changes.
Explanation:For a normal good, demand rises when consumers' income rises and falls when income falls.
This is caused by a change in a determinant of demand other than the good's own price.
A movement along the demand curve only happens when price changes.
A shift in the demand curve happens when other factors, like income, change.
Therefore, "change in demand" for a normal good implies a shift of the entire demand curve.
Answer:B. shift in the demand curve