In R V Oickle the Coerciveness of the Confession Was Attributed to Attributed

In R. v. Oickle the coerciveness of the confession was attributed to two police mistakes:

A) threatening to co-charge Oickle's brother and lying about fingerprints found at the scene.
B) referencing Oickle's mother's poor health and forcing him to take a polygraph.
C) lying that Oickle had failed the polygraph and exaggerating its accuracy.
D) misrepresenting the number of fires and the evidence found at the scene of the arsons.