What's inside the apartment: The apartment consists of a bedroom, kitchen, living room, and bathroom. 
In the bedroom, there is a cabinet, coffee table, desk, and sofa. The cabinet houses a bag of chips, a wine glass, and two books, while the sofa holds a bag of chips and a book. 
The kitchen is equipped with a dishwasher, eight cabinets, a kitchen table, a fridge, a microwave, and a stove. Inside the dishwasher, there are two wine glasses and a water glass. The first, second, third, fourth, fifth, and eighth cabinets are empty, while the sixth cabinet contains an apple and the seventh cabinet has a wine glass. The kitchen table is adorned with a book, a dish bowl, a plate, a condiment bottle, and a salmon. The fridge stores a bottle of wine, an apple, and a salmon. The microwave contains a condiment bottle, a cupcake, and a plate, and there is a plate inside the stove. 
The living room features a coffee table, a sofa, and a desk. On the coffee table, there is a wine glass, a plate, and two remote controls, and a book rests on the sofa. 
The bathroom is fitted with a cabinet, which is currently empty. 
Actions taken by David: David is situated in the bedroom. He proceeds towards the kitchen, approaches the second kitchen cabinet, opens it, and subsequently closes it. He then opens the first kitchen cabinet and closes it as well. David moves towards the dishwasher, opens it, and then shuts it. He opens the sixth kitchen cabinet and closes it, then walks towards the stove, opens it, and closes it. He opens the fifth kitchen cabinet and closes it. David then returns to the bedroom, approaches a cabinet, opens it, and closes it. He heads back to the kitchen, walks towards the third kitchen cabinet, opens it, and closes it. He then approaches the eighth kitchen cabinet, opens it, and closes it. David walks towards the fourth kitchen cabinet, opens it, and closes it. He then heads towards the bathroom, returns to the kitchen, walks towards the microwave, and is about to open it. 
Question: If David has been trying to get a cupcake, which one of the following statements is more likely to be true? (a) David thinks that the cupcake is not inside the microwave. (b) David thinks that the cupcake is inside the microwave. Please respond with either a or b.