I want to know why we should not choose answer B) as the right answer representing "With billions of tons." Is that because of the modifier "yet to be mined"?
Q) With billions of tons yet to be mined, some argue that coal conservation measures are unnecessary.
A) Because billions of tons of coal are
B) Because of coal in billions of tons
I agree (as always) with Raymot. It's hard to explain why, but perhaps it's the phrase "billions of tons of coal" versus "coal in billions of tons." The last one leaves me waiting for it to finish with "of what?" - that is "coal in billions of tons of rock" or something. Substitute "diamonds" and maybe you'll see what I mean.
The first one is quite clear that we are talking about billions of tons of COAL.
If we could add the emphasis properly when we read the sentence, then the second one wouldn't seem so odd: Because of COAL (in billions of tons yet to be mined), ..."
Thank you very much. Your explanation really helps. Have a nice day!