The effects of the Fugitive Slave Act included the following:
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It convinced Northerners that slavery was immoral. (True for many, as the Act heightened tensions and increased anti-slavery sentiments in the North.)
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It convinced Southerners that Northerners would help return slaves. (True, as the law was meant to enforce the return of escaped slaves and gave Southern slaveholders confidence that their property rights would be respected.)
The other two options:
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It convinced slaves that they were free to travel to the territories. (This is not a direct effect of the Fugitive Slave Act; the Act heightened fears among enslaved people rather than encouraging free movement.)
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It convinced the federal government that the issue of slavery could be peacefully resolved. (This is also inaccurate, as the Act contributed to rising tensions and conflict over slavery, ultimately leading to more divisive issues.)
So, the selected effects are the first two statements.