The answer should be their
A. hands and heads cannot really talk to each other ,so anything they "said" would be humorous.
Answer: The correct answer is : Leonardo did not intend that his inventions cause any harm.
Explanation: For Valery and Hamlet the ghosts represent uncertainty. Valery was a modernist writer, reflected reality and wrote from personal perspectives. She used universal experiences.
An infinitive is a verb not attached to a particular object or tense
so yes it is B
