The superlative is used to say what thing or person has the most of a particular quality within a group or of its kind (UA8, p. 6). Considering this, analyze these sentences.

I - This is the more delicious cake I have ever tasted.

II - That was the funniest vacation I have ever taken.

III - The Empire State Building is the taller building in New York City.

IV - She is the smartest student in the class.

Which of the sentences above correctly uses a superlative form of an adjective?

a.
I and II

b.
III and IV

c.
I, II and III, only

d.
I, II, III and IV

e.
II and IV, only