In western europe, mixed livestock - crop farming is

a: the worst type of integrated mixed farming
b: not a common practice for successful farming
c: the best known type of integrated mixed farming
d: unknown in the area but slowly becoming more popular

C:The best known type of integrated mixed farming

Explanation:

In Western Europe, mixed farming is seen to be dominantly found in between the northern belt and Mediterranean environment.  The mixed crop-livestock systems are a very independent system of farming in European countries. For example, here the livestock is fed from local farm resources such as the existing pastures and the crop residues.  As it includes both the crops and diary, this type of farming is practiced from India to Russia.