Answer:
The correct option is C, rent on the restaurant building
Explanation:
The ingredients used in preparing food is variable cost as it varies with the number of plates of food prepared.
Hours worked by cooks determine how much they are paid since the longer they stay the higher the pay,hence it is a variable cost.
The rent on the restaurant building stay the same regardless of opening hours ,hence it is fixed not variable cost.
The energy costs varies with the number of opening hours, it is a variable cost.
The hours worked by servers determine how their take-home would be ,as a result it is a variable cost.