Question: Which breed was developed in South Africa, Rhodesian Ridgeback or Canadian Eskimo Dog.?

Context paragraphs:
Maris Soule: Maris Soule (born June 19, 1939) is an American author of romance and romantic suspense novels, mysteries, and short stories.  Her latest book, "Eat Crow and Die", is a mystery novel.  Her books feature a variety of settings and situations, including the Iditarod Trail Sled Dog Race, Search and Rescue dogs, barrel racing, dressage, and a Rhodesian Ridgeback puppy.

American Eskimo Dog: The American Eskimo Dog is a breed of companion dog originating in Germany.  The American Eskimo is a member of the Spitz family.  The breed's progenitors were German Spitz, but due to anti-German prejudice during the First World War, it was renamed "American Eskimo Dog".  Although modern American Eskimos have been exported as German Spitz Gross (or Mittel, depending on the dog's height), the breeds have diverged and the standards are significantly different.  In addition to serving as a watchdog and companion, the American Eskimo Dog also achieved a high degree of popularity in the United States in the 1930s and 1940s as a circus performer.

Alaskan Malamute: The Alaskan Malamute is a large breed of domestic dog ("Canis lupus familiaris") originally bred for hauling heavy freight because of their strength and endurance, and later a sled dog.  They are similar to other arctic breeds, such as the Greenland Dog, Canadian Eskimo Dog, the Siberian Husky, and the Samoyed.

Phu Quoc Ridgeback: The Phu Quoc Ridgeback is a breed of dog from Phú Quốc Island in Vietnam's southern Kiên Giang Province.  The Phu Quoc Ridgeback is one of only three breeds that has a ridge of hair that runs along its back in the opposite direction from the rest of the coat (the others are Rhodesian Ridgeback and Thai Ridgeback).  The Phu Quoc is the smallest of the three ridgeback breeds.

Rhodesian Ridgeback: The Rhodesian ridgeback is a dog breed developed in South Africa.  Its European forebears can be traced to the early pioneers of the Cape Colony of southern Africa, who crossed their dogs with the semi-domesticated, ridged hunting dogs of the Khoikhoi.

Phyllis McCarthy: Phyllis McCarthy (12 March 1903 Johannesburg – 16 February 1986 Johannesburg) was a noted South African breeder of and authority on Rhodesian Ridgeback dogs.  She established the Glenaholm Kennels in 1949 in Pietermaritzburg, South Africa, played a seminal role in the Ridgeback community and produced a long line of Ridgebacks featuring prominently in the ancestry of almost all modern members of the breed.

Canadian Eskimo Dog: The Canadian Eskimo Dog is an Arctic breed of working dog, which is often considered to be one of North America's oldest and rarest remaining purebred indigenous domestic canines.  Other names include qimmiq or qimmit (Inuit language word for "dog").  They were brought from Siberia to North America by the Thule people 1,000 years ago, along with the Greenland Dog that is genetically identical.

Thai Ridgeback: The Thai Ridgeback (Thai: ไทยหลังอาน , rtgs: Thai Lang-An ) is an ancient landrace of dog, recently established also as a standardized breed.  The breed was formerly unknown outside of Thailand, but is gaining notice in the Western world.  They are also known as a Mah Thai Lang Ahn.  The Thai Ridgeback is one of only three breeds that has a ridge of hair that runs along its back in the opposite direction to the rest of the coat.  The other two are the Rhodesian Ridgeback and the Phu Quoc Ridgeback.

Greenland Dog: The Greenland Dog (Greenlandic: "Kalaallit Qimmiat", Danish: "Grønlandshunden") is a large breed of husky-type dog kept as a sled dog and for hunting polar bear and seal.  They were brought from Siberia to North America by the Thule people 1,000 years ago, along with the Canadian Eskimo Dog that is genetically identical.

Canine degenerative myelopathy: Canine degenerative myelopathy, also known as chronic degenerative radiculomyelopathy, is an incurable, progressive disease of the canine spinal cord that is similar in many ways to amyotrophic lateral sclerosis (ALS).  Onset is typically after the age of 7 years and it is seen most frequently in the German shepherd dog, Pembroke Welsh corgi, and boxer dog, though the disorder is strongly associated with a gene mutation in SOD1 that has been found in 43 breeds as of 2008, including the wire fox terrier, Chesapeake Bay retriever, Rhodesian ridgeback, and Cardigan Welsh corgi.  Progressive weakness and incoordination of the rear limbs are often the first signs seen in affected dogs, with progression over time to complete paralysis.  Myelin is an insulating sheath around neurons in the spinal cord.  One proposed cause of degenerative myelopathy is that the immune system attacks this sheath, breaking it down.  This results in a loss of communication between nerves in lower body of the animal and the brain.

Supporting paragraphs: Canadian Eskimo Dog Rhodesian Ridgeback
Answer: The Rhodesian ridgeback