Who were the border ruffians? Free-Soilers from Missouri
antislavery men from the North
slaveholders from the South
proslavery men from Missouri

The border ruffians were proslavery men from Missouri. AKA Proslaver activists basically. But you got your answer, so no explanation needed.

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.