In the question below, fill the gap with the most appropriate option: He moved out of the house because the landlord and his wife were always fighting _____

In the question below, fill the gap with the most appropriate option:

He moved out of the house because the landlord and his wife were always fighting _____

Answer Details

The correct option to fill the gap is "each other". This means that the landlord and his wife were always fighting with each other. "Themselves" and "theirselves" are not correct because they both refer to the subject of the sentence, which is "he". "One another" is also incorrect because it is usually used to refer to a group of three or more people, while in this sentence, there are only two people involved in the fighting.