Kevin 's old jazz record , floated to his ears from the library where his older brother sits reading their father 's worn copies of Plath and Salinger . Nick was in the dinning room , working on an essay and keeping his insulin levels balanced with Lays and bottled water ; they were out of Diet Coke , much to his annoyance . Just as he 's shoving the biggest potato chip he 'd ever seen into his mouth , Joe wandered in and snatched it from his fingers , grinning and taking a swig of the regular Coke he was allowed to drink . The stupid bastard .
According to the above context, choose the best option to answer the following question.
Question: Why is Nick required to maintain his insulin levels ?
Options:
- Because he is trying to control his weight by maintaining his blood sugar
 - None of the above choices .
 - Because he has diabetes and needs to do so to stay alive , or else he will have a serious medical issue
 - He is an alcoholic , and the lower his blood sugar the quicker he can get drunk


Because he has diabetes and needs to do so to stay alive , or else he will have a serious medical issue