The correct option is C Only A and B
Mixed farming is combining two or more independent agricultural activities on the same farm. A typical case of mixed farming is the combination of crop cultivation with dairy farming or in more general terms, crop cultivation with livestock farming.
Mixing has both advantages and disadvantages. For example, farmers in mixed systems have to divide their attention and resources over several activities, thus leading to reduced economies of scale. Resource-poor farmers going into mixed farming have to apply labour- intensive techniques. Advantages include the possibility of reducing risk, spreading labour and re-utilizing resources.