Ron Clarke, who died recently, was a Runner known for world records from which country?
[C]South Africa

Ron Clarke was an Australian middle- and long-distance runner who broke 17 world records, some by huge margins, in the mid-1960s. From 1963 through 1970 he won 202 of 313 races, ranging from a half-mile to the marathon (26.2 miles). His most remarkable feat came in 1965, when, on a 44-day tour of Europe, he broke 12 world records in 18 races. The records included, four days apart, the first three miles under 13 minutes and the first 10 kilometers (6.2 miles) under 28 minutes.