Which of the Following Cases Does Frankfurt Raise Specifically to Challenge

Which of the following cases does Frankfurt raise specifically to challenge the principle of alternate possibilities?

A) He imagines someone threatening Jones, and Jones giving into this threat
B) He imagines someone preparing to interfere with Jones just in case Jones decides to act otherwise
C) He imagines someone threatening Jones, and Jones being left completely unaffected by the threat
D) He imagines someone threatening Jones, and Jones acting in that way because of his own decision