Question: How to perfectly cut the strap of a dress?
Option 0: A good way to cut would be to carefully cut the strap using a sharp scissor right at the boundary, and the sowing/cutting away any rough patch.
Option 1: The best way to cut off the strap would be 3 inches above where the strap starts, so that in the future if required the strap can be sowed back into the dress without any problems.
Answer: 0