Answer:
D. Member nations combine and coordinate their economies.
Explanation:
The European Union is a single common market with the same rules, where competitors from other EU countries compete under the same conditions with a local member´s firms. The EU, and that´s the work of its executive branch the European Commission, has uniform norms and standards; all its members must follow similar macroeconomic, fiscal and trade policies.
A trapezoid is a type of quadrilateral that has an opposite pair of parallel sides; at lest, that definition seems pretty accurate to me.
The characteristics that many island countries in the Pacific Ocean share is that they experience significant seismic activity. This is because of the Pacific Rim and the plates are under these islands.
