Which of the following were included in the Republican Party’s platform for the 1860 election?

seceding from the United States

stopping slavery’s spread in the United States

introducing slavery to the North

preventing people from settling in the West

]Stopping slavery's spread. The Republican Party was founded as an antislavery party, and although not all wished to abolish slavery immediately, they wished to keep slavery confined to the South and prevent the institution from spreading.

My answer is B: stopping slavery's spread in the United States.

Explanation:

during the ming dynasty