Based on the chart , what can you infer about the emissions of the u. s. , china, japan, and india?

a. the carbon emissions of the us, china, japan, and india are steadily declining

b. the carbon emissions of the us , china, japan, and india are rapidly increasing

c. the carbon emissions of the us, china, japan, and india are almost equivalent to the carbon emissions of the rest of the world

d. the carbon emissions of the us, china , japan, and india are comparable to their relative population size