First Principles Thinking: not every private legal issue is professional misconduct
A is correct. Standard I(D) targets conduct involving dishonesty, fraud, deceit, or behavior that reflects adversely on professional reputation, integrity, or competence. A peaceful protest arrest does not automatically meet that threshold.
B is tempting because publicity can feel damaging, but embarrassment alone is not the standard's test.
C fails because Standard I(D) is not a blanket rule covering every private offense.