Inside . . . . . . . . station cafe it was warm and light.

Answer: Option C

Articles are part of speech, used to indicate nouns and to specify their application. Definite articles (the) limit the meaning of a noun to one particular thing. Indefinite articles (a, an) indicate that a noun refers to a general idea and not a particular thing.
The given sentence talks about a particular cafe, so a definite article must be used before it.