What is inferred about the carbon emissions of the U. S., China, Japan, and India, based on this chart? The carbon emissions of the US, China, Japan, and India are steadily declining.

The carbon emissions of the US, China, Japan, and India are rapidly increasing.

The carbon emissions of the US, China, Japan, and India are almost equivalent to the carbon emissions of the rest of the world.

The carbon emissions of the US, China, Japan, and India are comparable to their relative population size.