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

How to plan your business travel
Find out if you'll need any special accommodations.
Depending on where you're traveling to, you may need to make certain accommodations for yourself. This is usually more important for international travel, but it may be relevant for domestic travel as well.

1). Check across the world to find out if there are any additional accommodations or special accommodations you'll need. For example, if you're traveling to brazil for a tour, check to see if there are travel accommodations at the resort or lodging for yourself or any friends or relatives who may have local travel discounts.
2). If you have a job in the united states, you will likely need specific accommodations, such as ample transportation to and from work. If you're dealing in a country with some sort of serious medical or safety concern, you may need accommodation to help you support yourself.
3). Be sure to bring a valid passport. If you have your own home country, you may need to get a passport.
4). If you're traveling internationally, you may need to secure a visa before you leave. You may also need certain vaccinations, including anti-malarial medication.
The answer is:
4).