Fill in the blank with a possessive pronoun from the alternatives given below:
Possessive pronouns are used to show possession(yours, mine, his, its etc).
Personal pronouns are used to refer to people or objects that we are speaking about. In case of people, there are different personal pronouns that can be used depending upon whether we are talking in the 1st, 2nd or 3rd person perspective.
In the given sentence, the personal pronoun used is 'they' and the house is 'his'. Since 'they' bought the house, it is now 'theirs' which is a possessive pronoun used to denote something belong to 'them' or 'they' own it.
Therefore, the correct answer is option D) Theirs.
Option A) 'Hers' is incorrect because the sentence is talking about more than one person as is indicated by 'they' which is used in plural cases.
Option B) 'Its' is incorrect because 'its' is used in singular cases not in the plural as in the sentence.
Option C) 'This' is incorrect because it is used in cases where the subject is a singular male.