Answer
B
Work Step by Step
It is 20 percent because per capita grain production can be represented by 50/250.
Environmental Science for AP* (2nd Edition)
by Friedland, Andrew J.; Relyea, Rick
Published by
W. H. Freeman
ISBN 10:
1464108684
ISBN 13:
978-1-46410-868-6
Chapter 1 - AP Environmental Science Practice Exam - Section 1: Multiple-Choice Questions - Page 29: 8
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