The past tense of cost is usually “cost”.
Very rarely is the past tense “costed” used, it’s more common to just say cost.
Minor conflict because a minor conflict is hereditary
Since the kitchen is the place where you cook and prepare meals, then an office is definitely the place where you work. You learn in the study room, you play outside, you sing again in a room, but not in an office.
Its C
This is the answer. Welcome:)