Q.The only cereal that has originated and domesticated from the New World.

Of the cereals listed, only maize (Zea mays) originated and was domesticated in the New World; both wheat species and rice are Old World cereals.

Working

Cereal crops each have a well-documented centre of origin and domestication:

• Zea mays (maize/corn): domesticated in Mesoamerica (present-day Mexico) roughly 9,000 years ago from the wild grass teosinte -- this is a true New World (American) domestication.
• Triticum durum (durum/macaroni wheat) and Triticum aestivum (bread wheat): both originated in the Old World, in the Fertile Crescent of South-West Asia, where wild wheat relatives were first domesticated. …