Which Section of the Following Passage Needs to Be Edited

Which section of the following passage needs to be edited for incorrect spelling, incorrect grammar, inappropriate word choice or wordiness?

A) The artichoke dip was the
B) hit of the party, some people
C) wondered how much butter
D) had been mixed into it.
E) The mediator used some
F) light humor to try to
G) diffuse the situation,
H) but the tension remained.
I) Tom's stylish friend paid him
J) a great compliment, saying that
K) his new jacket complimented
L) his other clothes perfectly.
M) All the students agreed that
N) the calculus midterm exams
O) were much harder then
P) they had been expecting.
Q) 'Its not going to
R) clean up its own mess,"
S) the man said,
T) pointing at his neighbor's dog.