China and japan both have trade surpluses. what does that mean?

B

Explanation:

When a country maintains a trade surplus with another country, the first country exports more to the second country. In the case of Japan and China, the United States buys more goods from the Asian countries than Japan and China buy from the North American state. The United States would have a surplus if it sold more goods to China and Japan than it purchases.

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.