The remarkable similarity of Thule artifacts throughout a vast region can,in part,be explained as a very rapid movement of people from one end of North America to the other.
A. The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as
B. Thule artifacts being remarkably similar throughout a vast region, one explanation is
C. That Thule artifacts are remarkably similar throughout a vast region is, in part, explainable as
D. One explanation for the remarkable similarity of Thule artifacts throughout a vast region is that there was
E. Throughout a vast region Thule artifacts are remarkably similar, with one explanation for this being
OA is D
A. The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as
B. Thule artifacts being remarkably similar throughout a vast region, one explanation is
C. That Thule artifacts are remarkably similar throughout a vast region is, in part, explainable as
D. One explanation for the remarkable similarity of Thule artifacts throughout a vast region is that there was
E. Throughout a vast region Thule artifacts are remarkably similar, with one explanation for this being
OA is D












