If the demand for letters written by Abraham Lincoln is higher than the demand for letters written by John Wilkes Booth, what would have to be true for the market equilibrium prices for these letters to be equal?

The supply of Lincoln letters would have to be less than the supply of Booth letters.

The supply of Booth letters would have to be less than the supply of Lincoln letters.

If the demand for Lincoln letters is greater than the demand for Booth letters, the market equilibrium price for Lincoln letters will always be greater than the market equilibrium price for Booth letters.

The supply of Lincoln letters and the supply of Booth letters would have to be equal.