All reactions require an initial input of energy from the surroundings into the system for the reaction to occur. Which two statements are TRUE of this initial input of energy. Choose 2 correct statements.

a
The initial input of energy is used to break the bonds of the products.
b
This initial energy is known as kinetic energy.
c
The initial input of energy is used to break the bonds of the reactants.
d
This initial energy is known as activation energy.

c

The initial input of energy is used to break the bonds of the reactants.
d
This initial energy is known as activation energy.