JAMB - Economics (2014 - No. 4)
A change in demand for a normal goods implies that, there is a
change in the quantity demanded as price changes
shift in the demand curve
movement along a given demand curve
change in the price elasticity of demand
توضیح
A normal good is a good that experiences an increase in its demand due to a rise in consumers' income. In other words, if there's an increase in wages, demand for normal goods increases while conversely, a wage decline leads to a reduction in demand.
From the above option, B is correct. A shift in the demand curve happens when other determinants of demand apart from price cause demand to change.