Question

reactants will successfully move forward in the reaction when... they collide with each other in the proper state of matter. they collide with each other. they collide with a specific amount of energy and concentration. they collide with the proper orientation and sufficient energy.

Explanation:

According to the collision - theory in chemistry, for reactants to successfully react, they must collide with the proper orientation and have sufficient energy (activation energy) to break the existing bonds and form new ones. The state of matter or just collision without proper orientation and energy is not enough.

Answer:

they collide with the proper orientation and sufficient energy.