Answer:
A. There is an overall energy increase when bonds form.
Step-by-step explanation:
Remember that when a chemical reaction occurs, molecular bonds are broken and other bonds are formed to make different molecules. For example, the bonds of two water molecules are broken to form hydrogen and oxygen. Energy is always required to break a bond, which is known as bond energy but we release energy when we form a bond.
Many atoms are unstable because they have to comply with the octet rule, so they form bonds with other atoms and the energy is released. So based on this logic, the answer would be A. There is an overall energy increase when bonds form.