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 a bag of chips and a book are placed on the sofa. 
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, and fifth cabinets from left to right are empty, while the sixth cabinet contains an apple. The seventh cabinet holds a wine glass, and the eighth cabinet is also empty. The kitchen table is adorned with a book, a dish bowl, a plate, a condiment bottle, and a salmon. The fridge contains a bottle of wine, an apple, and a salmon. Inside the microwave, there is a condiment bottle, a cupcake, and a plate. A plate is also found 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 is placed on the sofa. 
The bathroom is furnished 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 walks towards the dishwasher, opens it, and then closes 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 walks back to the kitchen, approaches the third kitchen cabinet, opens it, and closes it. He walks towards the eighth kitchen cabinet, opens it, and closes it. Finally, he walks towards the fourth kitchen cabinet. 
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 inside the microwave. (b) David thinks that the cupcake is not inside the microwave. Please respond with either a or b.