Phrase: ...is consistent with the overdevelopment of one power at the expense of

[Andre.ikeda]

I just did a test that says the current phrase is incorrect. Where''s the mistake?

... is consistent with the overdevelopment of one power at the expense of the rest.

Thanks a lot!

[Mister Micawber]

There seems to be nothing wrong with the partial sentence you have quoted. Please supply the complete context.
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Native English teacher at Mister Micawber's