What 2 things must occur for collisions to be successful and the reactant particles react? Choose the 2 correct answers.



a
Reactant molecules must collide with low energy.
b
Molecules must collide with the incorrect orientation.
c
Molecules must collide with the correct orientation.
d
Reactant molecules must collide with high energy.

c

Molecules must collide with the correct orientation.
d
Reactant molecules must collide with high energy.