What's inside the apartment: The apartment consists of a bedroom, a bathroom, a living room, and a kitchen. 
In the bedroom, there is a coffee table. 
The bathroom houses a cabinet, which is currently empty. 
The living room is furnished with a cabinet, a coffee table, a sofa, and a desk. The cabinet contains four water glasses, a dish bowl, two apples, a remote control, and a condiment bottle. A wine glass and a bottle of wine are placed on the coffee table. 
The kitchen is equipped with a fridge, a stove, a kitchen table, and a microwave. Inside the fridge, there are three apples, a bottle of wine, and two dish bowls. The stove contains a salmon, a cupcake, and a plate. A condiment bottle is stored in the microwave. 
Actions taken by Robert: Robert is situated in the bedroom. He proceeds towards the kitchen and advances towards the fridge. 
Question: If Robert think there isn't an apple inside the fridge, which one of the following statements is more likely to be true? (a) Robert has been trying to get a salmon. (b) Robert has been trying to get an apple. Please respond with either a or b.