The Oasis Theory Argues That:​

The oasis theory argues that:​

A) ​people congregated in fertile and well-watered areas where agriculture had already begun
B) ​increased rainfall contributed to the need to begin planting crops and herding in areas that were arid
C) ​drought created a need for people to congregate in limited areas and begin collecting grass seed
D) ​herding and cultivation began in areas where irrigation could be established