According to the passage, why does the author concern himself with Shakespeare’s usage of the word good?
A. He was seeking confirmation for his belief that both the use of the word and the concept of good are strikingly common.
B. He was looking for a definition of the concept of good and turned to Shakespeare for inspiration.
C. He was trying to understand the lack of the concept of good and goodness in the works of Shakespeare.
D. He was seeking support for his belief that Shakespeare was able to use the concept of good more effectively than any other author.