The answer is (A) economic protectionism and regulation.
Explanation:
Since the early 1980s, the Philippines has liberalized its trade policy by reducing tariff rates and removing import quantitative restrictions (see Table 3). ... TRP I also reduced the number of regulated products with the removal of import restrictions on 1,332 lines between 1986 and 1989.
A Plateau is smaller than a Savanna. A Savanna has more flat land than a Plateau. They both are flat tho.. I think. I might be wrong.