What happened to the Underground Railroad after the Fugitive Slave Act was passed? The Brainliest answer will be granted

A. It became less effective.

B. It grew and became busier.

C. It was shut down by slave hunters.

D. It was shut down by the federal government.

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources