What did the union fear would happen when Texas requested annexation?

1. That it might into war with Mexico.

2. Fear of power shifting to the south.

3. Fear of return of slave trade.

Explanation:

Texas Annexation of Texas into the United state of American was a result of the convention of 1845 which was aimed at admitting Texas into the union. This convention of admission made Texas the 28th state to be admitted into the union.

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number 1 is a)