Read the excerpt from The Strange Case of Dr. Jekyll and Mr. Hyde. Mr. Utterson the lawyer was a man of a rugged countenance that was never lighted by a smile; cold, scanty and embarrassed in discourse; backward in sentiment; lean, long, dusty, dreary and yet somehow lovable.

This sentence is part of the exposition because it..

a) introduces a character.
b) makes the reader curious.
c) develops the central conflict.
d) provides tension for the story.