Q42: Why the answer is D ?

These questions refer to the following graphs. AVERAGE VEHICLE OCCUPANCY RATE FOR COMMUTERS MEANS OF TRAVEL FOR TO CITY P AND ITS SIX SUBURBAN COUNTIES COMMUTERS TO CITY P City P Public Other Suburban County P Transit County V 10.7% Car/ County W Van Pool* 14.3% County X 70.4% Drive Alone County Y County ZOf the commuters to City , ; of those who drive alone are going to change their means of travel while the rest of the commuters to City / will continue to use the same means of travel. If , of those who are going to change join a car/van pool, what will then be the percent of commuters to City / who travel by car/van pool? 49.5% 45.9% 35.2% 31.9% 28.3% City P Public Other Suburban County P Transit County V 10.7% Car/ County W Van Pool" 14.3% County X 70.4% Drive Alone County County Z 1.0 2.0 3.0 Commuters Note: Drawn to scale. @D