Answer
D.
Work Step by Step
A.-C. can all be parts of altruism but aren't necessarily so.
Biology (11th Edition)
by Raven, Peter; Johnson, George; Mason, Kenneth; Losos, Jonathan; Singer, Susan
Published by
McGraw-Hill Education
ISBN 10:
1259188132
ISBN 13:
978-1-25918-813-8
Chapter 54 - Behavioral Biology - Review Questions - Understand - Page 1162: 12
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