Concept:To make a plastic ban effective, the government must support both public awareness and the availability of affordable alternatives.
Explanation:A ban on single-use plastic requires people to change their daily habits.
Course I suggests launching an awareness campaign to encourage the use of eco-friendly products.
Such a campaign will help citizens understand the harm of plastic and accept sustainable substitutes.
Thus, course I is a practical and necessary step.
Course II suggests providing subsidies to companies that manufacture eco-friendly products.
Subsidies will lower production costs, making green alternatives cheaper and more easily available.
This directly helps replace banned plastic items in the market.
Therefore, course II also strengthens the ban and supports its smooth implementation.
Since both actions address different aspects of the same problem, both are advisable.
Answer:Both courses of action I and II follow.
Correct option: D.