Which two arguments did proslavery activists use to defend slavery?

slavery allowed people to develop a deep sense of gratitude.

slavery improve human courage, strength, and willpower.

slavery was needed to maintain the southern economy.

slavery had historical roots because ancient societies had slaves.

slavery ensured the smooth functioning of american society.

The president has the power to grant pardons . true or false

The internal combustion engine was an innovation of

10 points per question and brainlist 1. name four of the ruling dynasties of china. describe at least three contributions to society from each dynasty. 2. why did the qin ruler zheng burn chinese literature and philosophy books? how did the han dynasty establish a strong and effective government? why did people rebel against the sui rule? 3. what new technologies were invented during the tang dynasty and fully developed in the song dynasty that would eventually have a great impact on the world? explain why this technology had such an impact. 4. who were the invaders that seized control and took over the song dynasty? 5. how was china's history affected by its policies of isolation from the outside world during the ming dynasty?