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Explanation: The muckrakers were effective in making changes in American society in the early 1900s. People like Ida Tarbell, who wrote about the Standard Oil Company, helped bring about changes in business. Upton Sinclair helped bring about changes in consumer protection laws by writing about the meat industry.

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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