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1 vote
How much ancient plant debris is necesary to form one foot of coal A.one foot of plant debris B.ten feet of plant debris c.50 feet of plant debris d.one hundred feet of plant debris.

2 Answers

1 vote
i think it is b i hope it helps
User Nwaltham
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5 votes
the correct answer is B 
User Julien Genestoux
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