Which rule should you follow to form possessive nouns?
a. to form the possessive of plural nouns that end in the letter s, add an apostrophe and s.
b. to form the possessive of most singular nouns, add just an apostrophe.
c. to form the possessive of plurals that do not end in s, add an apostrophe and s.
d. do not use apostrophes to form the possessive of most nouns.

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."