Step 1: Understand the sentence's structure.
The sentence talks about something that happened to the house help in the past, which suggests a completed action.
The correct form of the verb "run away" in this case is "has run away" because it is in the present perfect tense, indicating an action that happened in the past and has relevance to the present.
The other options are incorrect because they either use the wrong tense or structure.
Step 2: Hence, the correct answer is (2) Has run away.