An example of government reforms during the progressive era
a. direct primary
b. initiative
c. referendum
d. all of the above

wood carving remains today the primary sculptural art form of the sub saharan continent. african art history shows the earliest wooden sculptures from the 17th c are attributed to the kuba, central zaire but the earliest surviving sub-saharan sculpture is a zoomorphic head found in 1928 in central angola.

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answer; i believe the correct answer is (the willamete valley);