Read the following context and choose the best option to answer the question.
Context: He seems like he 's mentally impaired somehow . As I ' m going through the spiel , asking him what size what bread what sandwich what cheese , my coworker ( we 'll call her Smash ) mouths to me , " HE 'S SO DRUNK ! " Ahh , that 's what it was .
Question: Why does the person come off as mentally impaired ?
Options: 
- They have a low IQ .
 - They are mentally impaired .
 - They are high on something .
 - They are inebriated .


They are inebriated .