Option (A) is the correct answer.
EXPLANATION:
There are two types of articles:
DEFINITE ARTICLE (THE) : Article 'the' is used to refer to a DEFINITE thing or person.
INDEFINITE ARTICLE(A/AN): Article 'a/an' is used to refer to a thing or person in general. For instance: man, door etc.
Article 'a' is used with consonant sounds whereas article 'an' is used with vowel sounds.
In the first blank, article "a" will be used because article "a" is used to describe a general noun ( guest is not specified, therefore article "the" is incorrect.)
In the second blank, table is specifically mentioned where the guest is sitting(DEFINITE). Therefore, article "the" will be used.
In the third blank, meal is a general noun, therefore article "a" will be used.
In the fourth blank, article "a" will be used because article "a" is used when the speaker is mentioning something for the first time or making a general statement.