A. are that the author of the pamphlet deliberately sabotaged them
Subject: Theory (singular), verb should be singular i.e. IS instead of ARE. Reject
B. are that the pamphlet’s author deliberately sabotaged it.
Subject: Theory (singular), verb should be singulari.e. IS instead of ARE. Reject
C. is that the author of the pamphlet deliberately sabotaged them. No SVA. Conveys the meaning well i.e. the author sabotaged the Beale ciphers before publishing them in the pamphlet. Keep
D. is that the author of the pamphlet deliberately sabotaged it. IT is used for ciphers.
Author sabotaged the ciphers (plural) and not the pamphlet.Reject
E. is that the pamphlet’s author deliberately sabotaged the pamphlet.
No SVA but meaning is distorted. Author sabotaged the ciphers before publishing them and not the pamphlet.
Answer should be C
Posted from my mobile device