Auctions in recent years have resulted in higher prices paid for letters written by john wilkes booth than those written by abraham lincoln. what is a reason for this difference in price?
there is a surplus of letters written by booth and a shortage of letters written by lincoln.
booth was a well-known actor; the demand for his letters rose as wealthy actors attempted to buy them.
there are more letters available for collectors to buy that were written by lincoln than there are letters that were written by booth.
many people are more fascinated by villains and anti-heroes than by heroic figures.

There are more letters available for collectors to buy that were written by Lincoln than there are letters that were written by Booth.

Explanation:

According to the law of supply and demand, the price of a certain good will increasing if the supply of that good decreased.

Since there are less letters written by booth, the supply for that particular goods also decreased, making that good really scarce in the market. This is why the price of letters by John Wilkes Booth is higher than Lincoln's.

d.) continue to rise rapidly

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)