Question

Hich of the following imports has increased over the past 6 years?

a. coal
b. oil
c. lumber
d. all of the above

Answer 1

Based on the given choices, I believe all of the above are imports that have increased over the past 6 years.
Coal, Oil and Lumber are resources that is very in need to most countries nowadays, thus the more people needs it, the more imports it could be transported.

Answer 2

It's coal in edgenuty