The C scale has no flat or sharp notes, if I add a flat B note instead of a B note I will have an F scale, add a flat E you have a flat B major. From this point adding a flat A, D G C will give a corresponding scale in the cycle of 4th. Example if I add a flat A to the flat B and E I get an E flat major scale. On the other hand if I sharpen the F I get a G scale, adding a sharp C will give me a D major scale. From this point adding a sharp G D A E will give me the cycle of 5th scale. Starting with any note of the scale either in cycle 4th or 5th will give me that equivalent of the mother scale. Right now I am on GF 2 level lesson on C major minor scale runs/practice. The reason I brought this up is to clear my mind if this is correct or not. In this case the C minor belongs to Eb major because the E B A was replaced with a flat E B A note, a cycle of 4th scale.