The correct option is C Consultants
The primary sector produces the raw materials that are used to make all the other products. Since the primary sector predominantly consists of agricultural activities, it is also called the agricultural sector.
The secondary sector or the industrial sector comprises activities in which the natural products obtained from the primary sector are converted into other products. Bakers, for instance, use inputs and make finished products.
The tertiary sector or the service sector comprises all services, retail businesses, and service personnels like teachers and consultants.