Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Why does the professor mention the floor plan of a house

A．To give an example of a factor that would influence a decision.
B．To give a personal example in which he found AHP useful.
C．To show that AHP can be applied to the design of houses.
D．To name some criteria that are not important in decision-making.