Where a Court Is Construing a Statutory Offence and Concludes

Where a court is construing a statutory offence and concludes that the offence should be presumed to have a mens rea element, what mens rea element is implied?

A) that the defendant must intend every element of the actus reus
B) that the defendant will have a defence if s/he believed that an aspect of the actus reus did not exist
C) that the defendant must believe all the elements of the actus reus exist
D) that the defendant was negligent