Patty Is Stopped by the Police

Patty is stopped by the police. The police search her car and find a quantity of cocaine inside a small box in the glove compartment. The box was wrapped up as a birthday present and there was a gift tag attached which read, 'To Patty, Happy birthday! From Greg'. Patty claims that she had no idea that the box contained cocaine. Which ONE of the following statements is true in respect of Patty's liability?

A) Patty might be charged with possession of a Class B drug under s.5(2) and might have a defence under s.28.
B) Patty will be convicted of possession of a Class A drug under s.5(2) .
C) Patty might be charged with possession of a Class A drug under s.5(2) and might have a defence under s.28.
D) Patty might be charged with possession of a Class A drug under s.5(2) and might have a defence under s.5(4) .