Use reasoning to lead to the answer of the following question:
John noticed that there was a lot of dust in the room. He cleaned off the place where food is served last.  Where might John have cleaned last?\nOptions:\n- shelf\n- library\n- table\n- fridge\n- refrigerator

table
Food is served on table.

Table gets dust on it.

John might have cleaned the table last.

.

Therefore, the answer is table