You would use direct observations to answer which of the following questions?

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

the answer is b. dilution

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)