Respuesta :
The correct answer is B) The falling apart of the Whig Party.
Letter A cannot be correct, as California was added as a free state thanks to the Compromise of 1850.
Letter C cannot be correct, as the Democratic party still exists today and has not left the public eye since the early part of the 19th century.
Letter D cannot be correct because Missouri entered the Union as a slave state thanks to the Missouri Compromise of 1820.
This shows that only letter B can be correct.