Select all correct answers.
For every set \( A, B \) and \( C \), we have \( (A-B)-C=A-(B-C) \).
For every set \( A, B \) and \( C \), we have \( (A-B)-C=(A-C)-(B-C) \).
For every set \( A, B \) and \( C, A \subseteq B \) if and only if \( C-B \subseteq C-A \)
For every set \( A, B \) and \( C, A \subseteq B \) if and only if \( C-A \subseteq C-B \)