Answer:
B
Step-by-step explanation:
Using technology, the most achievable option should not be a definite option.
Cleaning up oil spills do not affect air pollution. Hence A is wrong.
Reducing emissions through using technology (e.g. Using renewable energy to replace oil and gas industry) helps to reduce reliance on oil and decrease its usage, hence reducing emissions into the air that is very probable to do.
Ban use of all pollutants is a policy and doesn't use technology. Hence the option is wrong.
Removing All CFC is not scientifically possible as it is a absolute claim that is not possible physically to complete. Hence D is wrong.