What's inside the apartment: The apartment consists of a bedroom, kitchen, living room, and bathroom. 
In the bedroom, there is a coffee table and a desk, with a book and a water glass placed on the coffee table. 
The kitchen is equipped with four cabinets, a fridge, a kitchen table, a microwave, and a stove. The third cabinet from the left is empty, while the second cabinet houses a water glass, and the first cabinet contains a bottle of wine. Inside the fridge, there are three plates and two cupcakes. The microwave is currently holding a salmon, and there is also a salmon and a plate in the stove. The fourth cabinet from the left contains a condiment bottle. 
The living room features a cabinet, a sofa, a coffee table, and a desk. The cabinet holds two wine glasses, a dish bowl, and an apple. On the coffee table, there is a dish bowl, a plate, a wine glass, and a remote control. 
Lastly, the bathroom has a cabinet, which is currently empty. 
Actions taken by Mark: Mark is situated in the kitchen. He strides towards the stove, opens it, then promptly closes it. Subsequently, he moves towards the refrigerator, preparing to open it. 
Question: If Mark has been trying to get a cupcake, which one of the following statements is more likely to be true? (a) Mark thinks that the cupcake is not inside the fridge. (b) Mark thinks that the cupcake is inside the fridge. Please respond with either a or b.