The noun 'interview' is non-specific because it's mentioned for the first time and is not followed by a clause that would further specify it. Hence an indefinite article is used. 'An' is an indefinite article used for the non-specific noun 'interview' that begins with the vowel 'i' hence option B is correct. Option A is incorrect because it's used for non-specific nouns beginning with a consonant and 'interview' does not begin with a consonant. Option C is incorrect because it's used for nouns which are specific and 'interview' is not specific in the given context. An article is generally not used before a proper noun or when the noun is uncountable, since 'interview' is neither a proper noun nor an uncountable noun, option D is incorrect.