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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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genderma genderma
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9 years ago
By about eighteen months of age, an infant can solve ________ displacement problems, but not ________ displacement problems.
A) physical; mental
B) mental; physical
C) invisible; visible
D) visible; invisible
Textbook 
The World of Children

The World of Children


Edition: 3rd
Author:
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yariyari
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9 years ago
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genderma Author
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#2
9 years ago
Merci beaucoup!
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#3
9 years ago
Don't mention it!
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