Which of the Following Is Most Likely to Constitute Undue

Which of the following is most likely to constitute undue influence?

A) A firm demanding more in terms of pricing by withholding essential supplies.
B) A clergyman using a parishioner's emotional susceptibility to get the parishioner to contract with the clergyman.
C) Threatening to commence a frivolous criminal prosecution against someone,in order to get them to contract with you.
D) Grabbing someone's hand and forcing them to sign on a contract you have prepared.