The correct answer is C. Fewer aerosol cans are now produced.
Step-by-step explanation
The Montreal Protocol is a protocol created to promote the protection of the ozone layer by reducing the production and consumption of numerous substances that have been studied, and determined to be responsible for the depletion of ozone layer, mainly aerosols.
Aerosols contain chemical compounds known as Chlorofluorocarbons (CFCs) that have been the main causes of enlarging the hole in the ozone layer, this is because they absorb and scatter sunlight. Therefore, the correct answer is C. Fewer aerosol cans are now produced.