What happened to the Underground Railroad after the Fugitive Slave Act was passed?

The correct response is that the Underground Railroad grew and became busier.

Explanation:

The Underground Railroad is the name given to the network of routes that runaway slaves used to escape to areas where slavery was outlawed, particularly into the northern United States and Canada. It was during the late Antebellum period and during the civil war when this system was most active, in the 1840s through the 1860s. The Fugitive Slave Act was a compromise between the North and South in 1850 and it made it so that officials in the northern states had to return any suspected slave to their owners in the southern states. This act made it so a suspected slave would even be denied any trial and it is believed this led to the kidnapping of free blacks into slavery. Fugitive slaves had no right to defend themselves against the accusations they were escaped slaves. Despite the odds, it is believed that about 30 000 people escaped secretly to Canada using the Underground Railroad.