The police officers ascended the steps and checked every passport individually . I was again surprised when I did n't get my passport stamped . Once you cross one border within Central America , a stamp is not necessary until you leave the region .
Why did the police check each passport ?
Pick the best answer from the following options:
- To find a lost child based on their ID
 - To help out the border control agents
 - To try to return a laptop that they found
 - To check for criminals entering the country


To check for criminals entering the country