Which is the best dated evidence that humans have been on Earth for over four million years?

A fossil nicknamed Lucy was found in East Africa.
A specimen nicknamed Ardi was found in East Africa.
Artifacts from the Stone Age were discovered in East Africa.
Evidence from the last Ice Age was found in East Africa.

The best dated evidence that humans have been on Earth for over four million years is the discovery of a fossil nicknamed Lucy in East Africa. Lucy, scientifically known as Australopithecus afarensis, is estimated to have lived between 3.9 and 3.2 million years ago. This fossil provides significant evidence of early human evolution and has helped reshape our understanding of human origins.

The best dated evidence that humans have been on Earth for over four million years is the specimen nicknamed Ardi, which was found in East Africa. Ardi is a fossilized partial skeleton of an early hominin dating back approximately 4.4 million years. The discovery of Ardi provided important insights into human evolution and demonstrated that humans have been present on Earth for millions of years.