Answer:
A. understatement
Explanation:
In the statement, the weather forecaster, Shelby has taken off work to go camping, is the day that it begun raining. It's understatement because the sentence seems sarcastic.
an official order or proclamation issued by a person in authority
i hope this helps
If it is picking out a sentence in the paragraph, I would say "Researchers have been able to use this inherent intelligence to teach Koko sign language.