(A) No, since there is shared interest; this counts as self signing and thus is forbidden.
(B) Yes, no additional info is required.
(C) Yes, but only if they provide proof that they are an outside party.
This question is a part of the SEMrush Affiliate Program Terms Certification Exam. You can find 100% correct answers to all the questions asked in this exam in our SEMrush Affiliate Program Terms Exam Answers page.