It is estimated that the agriculture was invented 10000 to 12000 year ago. At this period of time, the modern humans or the Homo sapiens were spread to America.
The Homo sapiens begin to form villages and started domesticating animals. Also, all other ancestors of humans were possibly dead up to this period. The agriculture developments and advancements occurred after 10000 year ago.
Hence, the correct answer is Homo sapiens.