C, the natives didn't have immunities to the diseases
Explanation:
at one day teacher went to ride a bike but she saw bike is not present their.then she told their friend that their gift was stolen.at a time she decided to write note to the thief and put it on tree next to bike stand. when she came back from school same day she saw bike was present and she saw their is a paper on which thief written i am sorry i stole your bike what did i do it was wrong ive replace the lock hope you can accept my apology after than she write again the note to thief i want to thanks iv forgiven him and she said she did not do complain in police b/c she believed every one could do bed things some time they would realize their mistake
