In Contrast to the Out-Of-Africa Hypothesis,the Multi-Regional Continuity Hypothesis Contends

In contrast to the out-of-Africa hypothesis,the multi-regional continuity hypothesis contends that Homo ergaster migrated to many continents as much as one million years ago,and all populations evolved into modern humans because

A) no further evolutionary changes occurred.
B) there was sufficient gene flow between populations to maintain one species.
C) constant warfare allowed one or another lineage to dominate.
D) hybrids between different lineages were superior and replaced their ancestors.
E) all lineages changed but in response to the same evolutionary pressures so they changed in the same way.