Prince henry the navigator promoted the study of navigation and sponsored several voyages along africa's west coast. what country was henry the navigator from?

What is an example of how the abolitionist movement began to grow in the 1830s? check all that apply. a: most southern politicians argued to end slavery. b: anti-slavery publications were produced. c: the american anti-slavery society was founded. d: petitions demanded that congress end slavery. e: southern states reduced the use of slave labor.