Final answer:
The correct form of the verb 'tener' to fill in the blank is 'tengan'.
Step-by-step explanation:
The correct form of the verb 'tener' to fill in the blank in the given sentence is 'tengan' (Option A). The verb 'tener' means 'to have' in English. In this sentence, it is used in the present subjunctive form to indicate a desire, emotion or doubt. 'Me fastidia que ellos tengan que limpiar solos toda la casa' translates to 'It bothers me that they have to clean the entire house by themselves.'
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