Answer: C) better.
Explanation: Adjectives can compare two things or more than two things. To do that, we use comparative and superlative forms of adjectives. The comparative adjectives can be formed by adding "-er" at the end of the adjective (thinner, brighter, prettier, etc), or by writing the word "more" before the adjective (more beautiful, more boring, etc). There are also irregular adjectives, for example "good" which comparative is "better." So the sentence would be: the view from the roof is better than the one form the balcony.