What's inside the apartment: The apartment consists of a bedroom, kitchen, living room, and bathroom. 
In the bedroom, there is a coffee table with three water glasses, a plate, and a wine glass on it. 
The kitchen is equipped with a stove, kitchen table, fridge, and microwave. Inside the stove, you'll find a salmon and a cupcake. The fridge contains three apples, two dish bowls, and a bottle of wine, while the microwave houses a bag of chips and a salmon. 
The living room features a coffee table, cabinet, sofa, and desk. The cabinet is filled with a bag of chips, an apple, a bottle of wine, a condiment bottle, two remote controls, and a plate. 
Lastly, the bathroom has a cabinet, which is currently empty. 
Actions taken by Susan: Susan is situated in the bedroom. She proceeds to the kitchen, advances towards the microwave, opens it, and subsequently closes it. She then strides towards the stove, opens it, and closes it. She is now preparing to open the fridge. 
Question: If Susan has been trying to get an apple, which one of the following statements is more likely to be true? (a) Susan thinks that the apple is inside the fridge. (b) Susan thinks that the apple is not inside the fridge. Please respond with either a or b.