Answer:
My firm will suggest 2. Increase the price of private transportation by increasing tolls.
Step-by-step explanation:
As long as there are substitutes like private transportation, the other incentives for using public transportation won't have much effect.
Price is one of the things that affect demand. Increasing the price of private transportation therefore decreases its demand and makes people look for a cheaper alternative which will then be the public transportation.
The idea is to increase the demand for public transportation. By making the alternative less appealing, more people will be open to public transportation.