Which of the Following Arguments Involves a Deontological Constraint

Which of the following arguments involves a deontological constraint?

A) The kidnapper would suffer more from being tortured than the victim will suffer from waiting longer to be rescued. Therefore, the police shouldn't torture the kidnapper.
B) Torturing the kidnapper could save his victim, but it violates the police officer's obligation not to break the law. Therefore, the police officer shouldn't torture the kidnapper.
C) Stealing this loaf of bread would help feed my starving family, but if I get caught, my family would definitely starve. Therefore, I shouldn't steal this load of bread.
D) Stealing this loaf of bread would help feed my starving family, and the baker probably won't even realize that it's missing. Therefore, I should steal this loaf of bread.