Answer:
Three groups of people should be consulted for advice once you are in a foreign country.
Explanation:
1. Embassy-The embassy of his/her country to which they belong.
2. Airpot-we should also contact woth airrpot staff if we need any help or to ask something.
3. Citizens-The most important and role playing persons are the citizens of that country because they are citizens there so they know more about that place.
Hoped this helped :D
