During a peaceful protest at haymarket square, someone threw a at police which forced them to fire at the rally goers.

The correct answer is a bomb.

During a peaceful protest at Haymarket Square in Chicago, a protestor threw a bomb at the police, which set off violence. Eight people would die.

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.