What form of protest did the delegates to the first continental congress agree to use?
a) boycotting
b) picketing
c) rioting
d) tar and feathering

The delegates of the first Continental Congress agreed to use "boycotting" of British goods and services as a form of protest, since they thought that this would put economic pressure on the British government without weakening their cause. 

They had strained relationships with colonists but good relationships with american indians