Concept:Import substitution is a policy that discourages the importation of manufactured goods by promoting their domestic production.
Explanation:To discourage the importation of manufactured goods, a country should reduce its dependence on foreign goods.
It can do this by encouraging local industries to produce the same goods within the country.
This policy is known as import substitution strategy.
Import promotion and liberal foreign exchange would make imports easier, which is not desired.
An export-led strategy focuses on selling goods abroad, not on limiting imports.
Therefore, import substitution is the correct measure to discourage imports of manufactured goods.
Answer:D. import substitution strategy