根据以下内容回答题：Christopher Thomas，27，was a writer by night and a teacher by day when he noticed he was always tired and was losing weight fast．Diagnosed with diabetes，Thomas would need to inject himself with insulin（胰岛素）three times a day for the rest of his life or risk nerve dam-age，blindness and even death．And if that weren’t bad enough，he had no heMth insurance． After a month of feeling upset，Thomas decided he’d better find a way to fight back．He left Canton，Michigan for New York，got a job waiting tables，nicknamed himself the Diabetic Rockstar，and created diabeticrockstar．com，a free online community for diabetics and their loved ones——a place where over l．100 people share information and resources． Jason Swencki’s son，Kody，was diagnosed with diabetes at six．Father and son visit the online children’s forums（论坛）together most evenings．“Kbdy gets so excited．writing to ki出from all over，”says Swencki，one of the site’s volunteers．“They know what he’s going through．so he doesn’t feel alone．” Kody is anything but alone：Diabetes is now the seventh leading cause of death in the United States，with 24 million diagnosed cases．And more people are being diagnosed at youn-ger ages． These days，Thomas’s main focus is his charity（慈善机构），Fight It，which provides medicine and supplies to people——225 to date—who can’t afford a diagnostic large expenses．Fight-it．org has raised about$23，000一in products and in cash．In Mav．Thomas will hold the first annual Diabetic Rockstar Festival in the Cafibbean． Even with a staff of 22 volunteers，Thomas often devotes up to50 hours a week to his cause，while still doing his full time job waiting tables．“of the diabetes charities out there．most are putting money into finding a cure，”says Bentliey Gubar，one of Rockstar"s original member．“But Christopher is the only person I know saying people need help now．”
Which of the follow．ing is true of Christopher Thomas？

A. He needs to go to the doctor every day．
B. He sdudies the leading cause of diabetes．
C. He has positive attitude to his disease．
D. He encourages diabetics by writing articles．