A genre is a classification of something, and it depends on what you are classifying. Often it is music, and these genres can be rock, pop, jazz, punk, R&B and any others like this.
To tell a bigger story about the dust bowl.
The answer is A.
Shakespeare's plays are a great example of this, his plays being famous for containing the iambic pentameter.
Pandas : bears
Lizards are reptiles and pandas are bears
Checked out
Checked out is not domain specific language. When talking about medical visits, checked out is an informal term for having a medical evaluation. A check-up is a routine procedure done yearly that is normally called a physical in the medical field. A fall is a fall. There is no other domain specific vocabulary that can change this. Clinic and injuries are all typical domain specific terms that can be applied in medical situations.