Answer:
The answer is C.
Explanation: The Pullman strike of 1893 involved state and federal troops in order to kept under control.
Chemical change.
It would be a chemical change or reaction because the substance is changing its chemical makeup.
Britain still had a substantial amount of colonies and gradually decolonized overtime.
The French wanted older colonies back in their possession such as South-East Asian nations of Laos, Cambodia and Vietnam.