How does the poster reveal the position of many Bostonians regarding the Fugitive Slave Act A. by warning the public to report any fugitive slaves
B. by urging fugitive slaves to avoid kidnapping and capture
C. by advising the public to have nothing to do with fugitive slaves
D. by urging fugitive slaves to turn themselves into the authorities

B. By urging fugitive slaves to avoid kidnapping and capture

Explanation:

If you look closely the poster is trying to warn fugitive slaves of the "kidnappers/slavecatchers". Therefore the other 3 don't make sense so the only logical answer would be B.

answer; i believe the correct answer is (favorable balance);

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse