Answer:
John Glidden patented barded wire.
:)
Slavery was prohibited in states north of the 36°36', and this line continued west until California, which was completely admitted to the Union as a free state. In turn, slavery was allowed beneath the line. Missouri, on the other hand, was allowed into the Union as a slave state. This allowed for the amount of slave and free states to stay balanced to preserve the status quo in Congress.
The answer would be C european colonists were claiming land hoping to outdo neighboring competiteors
