Identify the best suffix to add to the given root word: Fashion 

An adjective is a term that characterises a noun's characteristics, features, or number. What are some adjective examples? Adjectives include numbers ("twelve eggs") and adjectives such as "beautiful," "smooth," or "heavy." Alternately, we could say that adjectives limit or restrict the meaning of pronouns and nouns by describing or altering them. Any type of quality may be named, including huge, red, angry, gigantic, one-of-a-kind, unusual, etc. Typically, an adjective follows a noun immediately, as in "a crimson clothing," "fifteen people."

With the suffix 'able,' the word 'fashionable' is formed as we know that word which ends with 'able' is adjective.

'Fashionable' refers to being 'characteristic of or influenced by current popular style.'

As a result, option A is right.

Options B, C, and D do not exist.

As a result, alternatives B, C, and D are incorrect.