Answer:
(a) Import Quota
Step-by-step explanation:
Option B is wrong because import duty is the tax, which is collected from imported products. It cannot restrict any items or protect the coconut-based products industry.
Option C is incorrect because import tariff allows charging imported products at higher prices to restrict import goods. In that case, the company does not increase the imported goods price.
Option D is incorrect because the company does not get a subsidy from the government.
Therefore, option A is the answer because import quota restricts companies from importing goods and services on a limited basis to protect the local manufacturers.