Harriet Tubman was able to fight against the oppression of slavery by helping the enslaved people flee the South and advocated for abolition.
He was a right activist that led numbers of slaves to freedom on the Underground Railroad in the line that cut inland through Delaware along the Choptank River.
Hence, he was able to fight against the oppression of slavery by helping the enslaved people flee the South and advocated for abolition.
Therefore, the Option D is correct.
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