2.- Superlatives
The superlative is used for comparing one person or thing with every other member of their group (e.g. S he is the tallest girl in the class). The formation of the superlative depends on the number of syllables in the adjective. Look at the table below:

SYLLABLES | ADJECTIVE | COMPARATIVE
One syllable adjectives | Young | The youngest
One syllable adjectives ending in "e" | Nice | The nicest
One syllable adjectives ending in consonant + vowel + consonant | Hot Slim | The hottest The slimmest
Two syllable adjectives ending in -y, -er, -ow, -le | Happy | The happiest
Other adjectives with two syllables | Boring | The most boring
Adjectives with three or more syllables | Interesting | The most interesting

A

C