Question

what is the best way to avoid contaminating oceans?
ignore the issue and focus on land pollution
increase ocean mining and drilling
raise public awareness and be more careful

Explanation:

Ignoring the issue and focusing on land pollution won't solve ocean contamination. Increasing ocean mining and drilling can lead to more pollution. Raising public awareness and being more careful can lead to better waste management, reduced use of harmful substances, and more sustainable practices, which are key to avoiding ocean contamination.

Answer:

raise public awareness and be more careful