How were American Indians in Oklahoma affected by the oil boom? A. Most tribes grew extremely wealthy through the sale of mineral leases and lands for drilling. B. Few tribes were affected, as most oil was discovered on nontribal lands, but many tribe members took employment in the oil fields. C. Most tribes failed to capitalize on their potential wealth and often were swindled out of their potential income. D. Many tribes, like the Chickasaw, created their own drilling companies to exploit the vast wealth of their oil fields.​