What sentence doesn’t contain a grammar mistake?

A. The fire was the focus of the English Home.

B. The love of gardens is deep-rooted in the British peoples.

C. They have about five millions dogs, almost as many cats, 3 million parrot and other cage birds, aquarium fish - and 1 million exotic pets such as reptiles.

D. The English people believe that they are the only nation on the earth that is really kind to its animals.