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 a bottle of wine, a plate, and a dish bowl on it. 
The kitchen is equipped with a stove, kitchen table, microwave, and fridge. Inside the stove, there is a salmon. The microwave contains a condiment bottle and a bag of chips. The fridge houses an apple, a plate, a cupcake, a dish bowl, and a salmon. 
The living room features a coffee table, a cabinet, a sofa, and a desk. On the coffee table, there is a water glass and a remote control. The cabinet is filled with two dish bowls, a water glass, two apples, two wine glasses, and a condiment bottle. 
The bathroom has a cabinet, which is currently empty. 
Actions taken by Charles: Charles is situated in the bathroom. He proceeds towards the kitchen, advances towards the microwave, opens it, subsequently closes it, and is on the verge of opening the fridge. 
Question: If Charles has been trying to get an apple, which one of the following statements is more likely to be true? (a) Charles thinks that the apple is not inside the fridge. (b) Charles thinks that the apple is inside the fridge. Please respond with either a or b.