This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to experience baltimore for free
Consider a day trip.
If you live in the northeast or mid-atlantic, baltimore is less than a three hour drive from many major cities, and you can significantly reduce the worry of expenses adding up like hotels, transportation, etc. If you're driving, be sure to bring a handful of quarters to feed street meters for parking, or cash for parking garage fees.

Available options:
1). Ditch the vending machines and restaurant service. You can also leave a card behind on the counter at your ticket booth for greater self-control.;
2). If you don't like traveling, consider trying an air bus ride service. Most air buses make viewing attractions much easier to do.;
3). Unfortunately, these expenses are virtually unavoidable. Visit the baltimore museum of art (bma).;
4). If you're driving, consider traveling by car if it's feasible. Booking a light haul while you take a cab can greatly reduce the number of unwanted passengers you may encounter on the road.;
The answer is:
3).