In the context of baseball cards being a normal good, when incomes rise, the demand for baseball cards increases because consumers are willing and able to purchase more. This increase in demand would be represented as a rightward shift of the demand curve on a graph.
Given this, the correct response is:
The equilibrium point would move upward along the supply curve because of an increase in demand.
This reflects that with higher demand, the quantity sold and the price would both increase at the new equilibrium point.