The British used their navy to form a blockade of American harbors. To create a blockade means to . A. prevent ships from entering or leaving a harbor

B. assist merchant vessels to bring supplies in

C. allow French warships to pass freely

D. use cannons to fire from ships onto land

Plz which of the following statements about the fugitive slave act of 1850 is not accurate? a. marshals you refuse to arrest a suspected fugitive could be find $1000. b. slave owners had to present evidence an african-american in the north was a fugitive slave. c. any person who provided food or shelter to a fugitive slave could be find $1000 and placed in jail for six months. d. it required of federal marshals to arrest any african-american suspected of being a runaway slave.