Which sentence from "The Golden Touch" provides the best example of exposition?

A. This King Midas was fonder of gold than of anything else in the world. He valued his royal crown chiefly because it was composed of
that precious metal

B. All this while, it was only the gray of the morning, with but a streak of brightness along the edge of the sky, where Midas could not see
it.

C. When Midas heard her sobs, he determined to put little Marygold into better spirits, by an agreeable surprise, so, leaning across the
table, he touched his daughter's bowl..., and transmuted it to gleaming gold.

D. Her father did not think it necessary to tell his beloved child how very foolish he had been, but contented himself with showing how
much wiser he had now grown