David lives 2 blocks west and 3 blocks south of the southwest corner of Liberty Park. His office is 3 blocks east and 2 blocks north of the northeast corner of Liberty Park. On work days he walks on streets to the southwest corner of the park, then takes a diagonal path through the park to the northeast corner, and then walks on streets to his office. If his route is as short as possible, how many different routes can he take?
80
90
100
110
120
