What was harriet tubman's greatest achievement?

Harriet Tubman was an escaped slave who became a “conductor” on the Underground Railroad, leading slaves to freedom before the Civil War, all while carrying a bounty on her head. But she was also a nurse, a Union spy and a women's suffrage supporter.

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The former slave turned abolitionist and Union spy was a “conductor” on the Underground Railroad, and she helped free hundreds of slaves during the 1850s. She continued to help black Americans long after the Civil War ended. Sopuch said that many of her students are in awe of Tubman and her many accomplishments.

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answer; /// (a) and (b) ; /// but i believe the correct answer is ; /apart from fines and jail time, driving under the influence puts the life of the driver and everyone else on the road at risk; (b)