Which action during westward expansion had the most negative impact on the lives of slaves? A. The Fugitive Slave Act
B. The Mexican-American War
C. The Treaty of Washington
D. The Missouri Compromise of 1820

A. The Fugitive Slave Act

Explanation:

A is correct as it allowed slave owners to reclaim runaway slaves.

B is also not correct as after the war California entered Union as a free state and many other state had the opportunity to choose whether they would prohibit slavery.

C is not correct as it ended the slave trade.

D is not correct as according to it slavery was prohibited north of the southern boundary of Missouri.

africa

explanation:

explanation: we can only guess at how our actions may be perceived in the future. doing something really big like killing lots of people, saving lots of people, affecting the lives of lots of people is a sure fire way of being remembered in historical records. we can also make a difference in the history records by being a small influence on something bigger, whether that is as a civil servant, scientist or artist.

of course you could argue that we all affect history just as tiny cogs in a   bigger machine.

if you mean how do people influence our opinions of things which have already happened, then simply by writing a book which looks at things form a different perspective and trying to convince people that this perspective is more accurate or truthful. people do it all the time i.e. richard the third was a terrible or was he? plenty would disagree, it's just that their views aren't the most widely known.n: