Math - Geometry

If more than one plane contains three points A,B, and C, what must be true?
A)AB is perpendicular to BC
B)A,B, and C are noncollinear
C)A,B, and C are collinear

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  1. Just use your right hand for one plane and your left hand for a second plane.
    Intersect our flat right hand with your flat right hand.
    They meet in a line.
    All points that are in both planes lie on that line.

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  2. gb

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