In the early-19th century, South Carolina protested what it believed to be a violation of its rights by A) declaring war on the United States. B) plotting to impeach Andrew Jackson. C) threatening to

In the early-19th century, South Carolina protested what it believed to be a violation of its rights by A) declaring war on the United States. B) plotting to impeach Andrew Jackson. C) threatening to secede from the Union. D) legalizing slavery throughout the state.