Which of the Following Might Be Relied on by a Court

Which of the following might be relied on by a court in concluding that a confession was not given voluntarily?

A) The police used the defendant's childhood friend to play on the defendant's sympathy.
B) The police gave the defendant the Miranda warning and stopped questioning when the defendant stated that he wanted to speak to a lawyer.
C) The defendant has a long history of arrest and was familiar with his Miranda rights.
D) The police engaged in conversation with the defendant as a person with information that might help them find the person responsible for the crime.