The correct way to punctuate is seen in b:
<span>To whom it may concern:
</span>
In formal settings and when you don't know the exact identity of the person a dresses it is usual to use a colon in this situation.
The correct answer is c i believe
Answer:
To describe the difficulties that Enrique will encounter in Chiapas.
to tell the reader that Enrique is determined to find his mother.
Explanation: