After They Settled on New Guinea, the Lapita People

After they settled on New Guinea, the Lapita people

A) likely intermarried with the native Papuan population and created a new synthetic culture over time.
B) conquered the native Papuan population with their superior technology.
C) introduced farming to native Papuans.
D) killed the native Papuan population, partially through military conquest and partially through the spread of foreign diseases.