The answer is A. Hope this helps:)
Your data would be better.
The reason is because the data you have made depending on where you sourced or measured your data it's most likely going to be more reputable then your friends but it's good to compare data sets if you are both working on the same thing.
They were technically free. But the Fugitive Slave Laws said that any escaped slave must be returned. So if they were caught they had to go back.
An agricultural economy(farming)
