Answer:
you can't always
Explanation:
however, if an answer is understandable to you (as in you can logically agree with the way that an answer was developed, and that you have some idea of what the question was asking) you can typically trust it
(and challenge it if it is not)
Answer:
Agriculture production went up with more slaves to do it but without slave it would cost more money to pay people to do it.
Explanation:
