Which of the following best matches the description?Period of time when plant material accumulated in swamps and was ultimately converted to coal.

A. OPEC
B. Carboniferous period
C. OECD
D. hydrogen fuel cell
E. fossil fuels
F. methanol
G. Industrial Revolution
H. gross domestic product
I. hunter-gatherer
J. compressed natural gas


Answer: B

Environmental & Atmospheric Sciences

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